I need to get access to the speed signal wire and the engine speed sensor. Had a look behind the clocks today, i can see a 3 pin connector attached to the speedo cable (1 black, 2 yellow) and a 2 pin connector attached to the rev counter (1 grey, 1 orange). Can anyone tell me which wires i need to tap into? Should be 1 each for speed and revs. Its on a 94 RT. Any help would be appreciated.