Just bought a 16 ft 1981 Bass Tracker with a 40 hp Merc and the original Motorguide Basshawg trolling motor. I think it is a 28lb thrust. I have a newer Motorguide 40lb thrust that I would like to swap it out with but the plugs are very different. Both are 12 volt motors. Is it as simple as swapping out the receptacles, or is there more involved. Thanks for any replies in advance.