I think you may have us confused with another BMW forum as I personally don't recall such a thread
I also read your other post in another thread. If your car does have an amp, it's located behind the carpeted wall on the left side of the trunk. This will establish whether you have a 6-speaker setup or a 10-speaker setup. Needless to say that you can't just match up the wires in the dash with what you see at the speaker locations. There are some 14 different wiring schemes for the E36 stereo systems
We've established that your car is a '93 325i, but there are three possible setups for that year: the 6-speaker setup, the early '93 10-speaker setup, and the later '93 10-speaker setup. The way to tell the difference between the latter two is to look at the amplifier connectors; there are two of them. One connector will have 12 pins, and the other will have either 12 pins (early '93) or 26 pins (later '93).
Now if you can narrow things down that much, I can provide you with the wiring configuration
Witey- can this be moved to the CA&E section?