Bosesound with Bluepoint CDC-M3

Maaahlzeit municipality ,
I have a BOSE system with GAMMA CC radio in my thick and have the BOSE-like changer Blaupunkt CDC-M3 incl. Interface ....
I wanted to clamp the part to test the function but I have 8 pins available on the radio plug (CD SDA ;CD SLC ;12+ ; 12 Shift+ ; CD Ground ; NF- ; Line in L+ ; line in R+) and from the interface a 3 wire cable with round plug (Pin 1=GN;pin6=BR;pin 7=WS) and an 8 wire cable (Pin1=free;Pin2=SW;Pin3=WS;Pin4=free;Pin5=RT;Pin6=SW;Pin7=BL;Pin8=
GE) !!!? Question:How is it jammed? According to the original plans of Audi it is not possible.I think the wire harness is different especially since the radio connector was disassembled.Where does the interface get the power supply (radio) from? This is not apparent in the schematics !
I've been able to get the radio on various cable combinations so far that it detects the changer only he does not respond. I have also left when connecting cable .... ?!Who can help ?