i have a 96 civic hatch with a stock cluster. i have the Ractive tach but all i need know is what wire goes to what. there are 4 wires.... red im guessing is positive, black is ground, and then theres a yellow and green wire. one must go to the distributer but i dont know which one. and i dont know which wire on the distributer. after i figure that out then im gonna need to figure out what the extra wire is used for ......PLEASE HELP!