I have a 1972 100hp johnson engine in which the electric shift switch went up. Its been impossible to find one since they are so rare, but I was just sold an electric switch said to be from a younger engine. My question is : my original wiring has 5 wires, green, blue, purple, and 2 whites and this other switch only has 3 wires. Is it possible to use this switch and somehow cancel out 2 wires or should I continue on my quest to find the exact same switch? Thanks!