The radio in my daughter's '96 A4 needs to be replaced. It contantly scans, even after landing on a very strong station it randomly starts scanning. Anyway, 11 years old and 150,000 miles, I don't want to pay for the Audi replacement so we bought an aftermarket radio with simple LF, RF, LR, RR leads. Problem is I can't find most of the speaker leads in the old harness. There is a brown connector with leads going to the front speakers which is fine. But the yellow connector that says it goes to the other speakers is not getting a signal to anywhere. Any help on how to connect the speaker wires is greatly appreciated.