How to connect Logitech Z-2300 without VGA?

Good evening, I would advise you to buy the control box with its cables, it's not that expensive and you won't have any trouble getting this subwoofer to work.
What you want to do now is intervene on the printed circuit board itself, which is not for everyone. Now, if you feel capable of doing it, you will need to identify the pins that send the power-on signal to the system. Once identified, you can bridge between the two, and for the audio input of the sub, it should be indicated in small print on the printed circuit board itself; the pins of the VGA connector are normally labeled.
I myself retrieved the sub from a Logitech X620 system, but that's for 5.1, while yours is 2.1, but I also have a VGA connector that controls everything.
If you want more details and can wait, I could take apart my sub tomorrow and guide you, the connections should be the same.

Look at what I've tried (1st link) and let me know your thoughts please (the plans in the bottom right are those of the wired remote found on this blog (2nd link)

Thank you in advance for deciphering all this for those who know

http://data.imagup.com/11/1142676611.jpg
http://blog.jseaber.com/2010/02/27/logitech-z-2300-control-pod-disassembly/

Thank you for replying so quickly, Logitech doesn't only sell the remote cable, I've seen it on several forums. (It's completely ridiculous)
But what I'm looking for is directly on the male connector on the subwoofer to know where to make a bridge and where the + and - for the sound input are, so I can connect the subwoofer to my setup (I will meticulously solder the cables onto the subwoofer as I don't have a printed circuit, I don't even have a "VGA" cable that connects to my subwoofer, or a volume control box, I only have what I need to power it)
https://www.imagup.com/data-recovery-solutions-for-small-businesses-of-san-francisco/

Thanks again in advance for your help!

Edit: Look at this photo, you might understand better what I'm looking for
https://www.imagup.com/data-recovery-solutions-for-small-businesses-of-san-francisco/

Well, if you have already located the terminals, you just need to solder directly on the circuit board of the preamplification.

No, that's exactly what I'm looking for. Where are the terminals for the "on/off"? Where is the audio input? I'm trying to figure out how to use my subwoofer simply by connecting the necessary parts together, but I don't know what to connect (or where the terminals for a volume knob, etc. are located...).

I eagerly await you taking apart your box to tell me which pin of the VGA connector corresponds to what :) thanks again

I'm busy darkblanc, it's not going to be a walk in the park to solder on the circuit board pads, I'm scouting and will keep you updated.

Well, here I am, going to disappoint you, my case is in pieces, I have the circuit board in front of me, and to my great surprise there are no markings, not a letter, not a number, except for the Logitech reference 02-00099-07 on the circuit, and a few numbers for the resistors and capacitors, but nothing on the 15 pins of the VGA connector. I also traced the paths to see where they led, but found nothing. I even searched online hoping to find an explanatory circuit diagram, but unfortunately nothing either. All I have left is to reassemble everything. As for you, try to find the control box with its cables second-hand; that's all I can suggest as a solution. I'm really sorry I can't help you more.

Thank you very much STARGATE43 for helping me anyway, I will try to find a control box, even though I think it will be hard,

and if someone knows even more and can tell me what each pin of the VGA connector corresponds to (or at least those I need to use my subwoofer), let me know, thanks in advance!

edit: for those who are knowledgeable, I found this, I don't know if it can help:
https://www.imagup.com/data-recovery-solutions-for-small-businesses-of-san-francisco/
http://blog.jseaber.com/2010/02/27/logitech-z-2300-control-pod-disassembly/
https://i46.servimg.com/u/f46/11/26/68/40/flash-10.jpg

there you go, I hope this can help you help me!