I'm really desperate here, I can't find a wiring guide anywhere, not even a picture that could give me the slightest idea of what I should be doing.
Can anyone help?
I'm attaching some pics, maybe they will make your reply easier.
Blaupunkt rear speaker amplifier
Blaupunkt rear speaker pins
My head-unit(Audi Concert I)
Head-unit pins
Head-unit wiring scheme