Originally Posted by Brian-bmw

+1 to big bob. The components in your pictures are the car's phone system. They are not related to the audio system. The first picture is the connector for the car's telephone control unit. The 2nd picture is the phone antenna amplifier. I can not tell what the third picture is, but I will bet that it is either the telephone control unit or the back side of the antenna amplifier.

Can you tell is if your car has navigation and whether it has DSP? That will help tremendously to guide you about where you find the car's radio antenna connection and how you might utilize the existing amplifier.