Another problem. I need to replace my electric shift controller on my '62 Evinrude 40 h.p. model 35933. My old controller has (3) buttons, neutral, forward & reverse, and three wires Red (power) green (F) & blue (R). I found a few replacement buttons on Craigs list, but they have (5) wire hook ups. Three are labeld the same as mine, then there are two more labeled 1 & 2 on them, but yet they still have only three buttons on them. Can I use the (5) wire controller and just hook up the three wires that are labeled RED, F & R or will it not work on a three wire set up by just not hooking up the remaining two leads to something and maybe even just snip them off of the controller?