I had an old passport 4500 directly wired to my car, but recently i bought an 8500 and i want it directly wired as well. I cut the wire from the 4500 and have WHITE and RED wires. The telephone type plug for the 8500 has 4 wires instead of these two, RED,GREEN,YELLOW, BLACK. I was wondering how i should connect these 4 wires to the old 2 wires to make the connection work. If anyone has knows how, it would be greatly appreciated.