Okay, found it!

Notice the tightly wound, wiring. It is not exclusive, but, speaker wiring on BMWs normally are like this. This "blue" connector is for the tweeter.

Attached Images

 

__________________
2003 BMW X5 3.0i -- MT5, 3.64s final gears, H&R lowering springs, K-Mac bushing kit
2007 BMW X3 3.0Si -- MT6