ok so i was trying to figure out how to hook up my electric choke and i took off the oil pressure sender wire and seen that i only have two prongs. i thought i needed 3 to hook up electric choke? but their are three wires coming out of the harness. 2 different colored greens and a black i believe, any advice on that to do? i have a 1986 monte carlo with a 350 smallblock.