I have a big river jon, set up for fishing, hunting, etc. The T/M I have is an OMC older style 12v/24v model hand control. I have 4 wires coming from my two batteries to the plug and then the T/M has three wires going from the plug to the T/M. Here is my dilema. I want to install a foot switch on the deck so I dont have to turn the T/M on and off by hand every few seconds. How do I do this considering I have 3 wires going to the T/M? Is there a special foot switch designed for this application?