E30 OEM stereo - looking for wiring schematic

[Jed Crystal <jc@xxxxxxxxxxxxxx>]

I am finally replacing my OEM stereo with a  CD player. I've run all new
wires to bypass the BMW system, but was wondering if anyone had info about
the wires in the back of the stereo.  Or any tips if you've done the same
thing.  I was also thinking about spitting the pre-crossover wired front
floor speaker and door tweeter.  I was going to add another crossover and
treat the two speakers as separates.  Any advice out here?  It's an 88
325is.
many thanks in advance.

------------------------------