I've got a radio from a 98 Integra in my 98 EX, and I was wondering what plug in the back actually supplies the power. There's the gray wiring harness, a single prong connector, and a gray multi-prong connector. I went to swap in my factory radio, but then decided to stick with the Integra and now I can't get power to it. I've checked all the fuses and think maybe a wire came loose.