i might be adding more parts as time goes by, as i'm trying to learn wiring. my truck is a 1983 blazer w/ 6.2 diesel, silverado package. cruise/blinkers on column, wipers/lights on dash. what is the bright yellow box behind the guages that has a wire set coming out of it that is red, black and green? these wires are all connected along their lengths to one another such that it essentially makes one cable, but its a flat cable - don't know how else to describe it and the camera is at home and i'm not. any ideas???