I have a 2010 Prius and simply love it. I am upgrading the radio to one with Nav and Rear view camera. The one I currently have is the basic radio that came with the car. Can anyone tell me what the BLUE connector is and what the round connection above the radio antenna is for. I think the BLUE connection is for the rear view camera and the other connector is for the SIRIUS antenna but would appreciate any information from those of you that really know what they are. Attached is a picture of the radio back.