Can anyone possibly tell me what the extra wire is coming from the upper end of my trolling motor? I've just purchased a 20ft deck boat with a Minn Kota 80lb 24volt trolling motor with AutoPilot. I've verified that the motor works fine as well as the autopilot. But there's also a wire zip tied along the coiled wire from the head and following the power plug. It has a 3 pin connector on the end, but I don't know what it used to plug into. Any help or guesses with this is appreciated.