Here is what the plug looks likeIn the picture the black wire is the negative lead of the trolling motor and the black with red tracer is the positive lead of the trolling motor. You need to connect the negative of your trolling motor to the negative slot, notice the negative sign on the plug where the black wire is connected, and connect the positive to where the black and red wire is. What happens is the metal strip you see in the plug connects the two 12 volt circuits from the trolling motor batteries in series making 24 volts. You should use a volt ohm meter to test with before connecting the trolling motor leads but this is the jumper that Bass Cat was talking about. Drop me a line if you have any questions, [url=mailto:coffeemp@sfasu.edu]coffeemp@sfasu.edu[/url]Mike