Stereo wiring help...

[the Spaeth's]

I have been going to update the stereo in our 91 200 20v Turbo Avant for
awhile now. The other day I pulled the stock stereo out and there were more
wires than I was ready for. Does anyone have an easy description of what
goes where? I am putting in an Eclipse CD player so I just need to know what
color wires would go where on the Eclipse unit. I have done quite a few
stereo installs but like I said there were more wires than made sense. I
looked in the Bentley but did not find what I was looking for.

thanks in advance,
Craig