I'm trying to hook up my system to a factory radio in an `03 eclipse. I was told by a local dealer I would need this adaptor (a PCA SNI-35), so I got it. The problem is finding which wires are the speaker wires coming out of the radio. I need to identify the left and right speaker wires. Does anyone know the wiring color scheme for a Mitsubishi cd/radio, model MR587251, or where I might find the information for same? This unit has two plug units in the back, one with 4 wires and the other with 6 wires.