Sound System with PC

i Have a Sony home theater system of which speakers i Want to connect iT wid my computer.
The system is around 10 years old which has 345W RMS (120x2W + 35x3W).
Model no is SONY HCD-VX90AV for VCD system & SS-VX90AV for speaker system (5 speakers).
The system doesnt have a MP3 or DvD playback just CD & VCD so i Wanna use those speakers wid my PC
But the problem is that it doesnt have a Standard 3.5mm jack instead each speaker has 2 wires output.
So is there any way through which i can connect those speakers wid my computer ???

i Need to buy a new mobo for my AmD x6.
So suggest me which is compatable with that & i will buy that & tell iF sound Card is required oR not ??

Is this where the “2 wires output” connects to the main unit itself? Im interested too. Maybe I can make an experiment at home.

YuP.
This is The connector f0R speakers & my VCD player.
So can u PlS. tell me how do i Connect Those kind of speaker connectors with my computer ???

Can anyone PlS gimme the solution ???