Audio Systems: Grand Voyager LE (Infinity)Sony Stereo Installation, plymouth grand voyager, chrysler grand caravan

Question
Hi I have a 1996 Plymouth Grand Voyager LE van (same as Chrysler Grand Caravan) with Infinity speakers. I'm replacing the broken stock radio with an aftermarket Sony unit. There are two 7 pin connectors and a mysterious 2 pin connector that goes to the stock radio. I'm not sure what I do with the 2 pin connector in terms of connecting to the new Sony unit? Is this something to do with a powered subwoofer amp that is in the van? The only hint I found is on www.installdr.com where they talk about a ground that needs connecting to the Infinity amp but not sure how this relates to the 2 pin connector. Any help would be appreciated.
Thanks, ..Roger

Answer
the 2 pin connector is for the stering controls

about the amplifier the only thing you need to do is connect the blue amplifier wire from the sony radio to the amplifier power wire  that it is also  blue if you are using a harness to do this installation