that link didn't helped me that much.
ok! here's my big problem : I have a Ford 4500 RDS car audio, and I want to mount it on another type of car and I don't know where to put all the wires.
I want to improve the interior look for my fathers old car wich is an Renault 12 Gordini also the sound.
So maybe someone on one of those sites has done what you want to do and has the answer for you. Honestly, it's probably a lot easier to just get an aftermarket radio, you only need a constant 12V, ignition 12V, and a ground (which every car should have) and then you wire each speaker independently to the radio.