Workshop ManualsOriginal source
Component Tests and General Diagnostics|Page 179
Add to repair workspace
Page 75
Connector A, black, power supply
Pin A1 - A8
Connector B, brown, loudspeaker output
Pin B1 - B8
Connector C, yellow, CAN comfort
Pin C1 - C6
Connector D, green, microphone
This is a source reference. Confirm exact model applicability in the original material.