I bought a takeoff Homelink consol of Ebay. It has the OEM wire harness on it. The wire colors are orange, green and purple with yellow stripe. I know there is a dimmer, power and ground. If I were a guessing man, I'd say the green is ground, orange is power and the purple with yellow stripe is dimmer. The problem is I HATE to guess. Can anyone tell me what each of the 3 wires goes to?