Use the schematic.
The amp doesn't utilize ISO connectors.
Im currently building a carpc in my Audi A4 B7 2005 and i have one question.
Today I have a Audi Concert II player, without BOSE.
I have ordered a TDA7850 Quad power amp, but i havent figured out what kind of harness i need between the TDA7850 and the 23-pin connector..
Or is this what i need?