OK...box is mounted on the right side of the drivers seat. Looking at the box, on the right side and going down are the following:

1) Key switch
2) A knob that rotates to the left and right
3) Input cable from the engine
4) A plug with 2 wires (grey and purple/pink)

What does #2 and #4 do? Wiring is kinda' messed up so I'm trying to figure this one out.
Thanks!

Mike