I have a electricraft that is retrofitted with 2 55# thrust 12 volt motors, here is the problem, to power the boat it is set up with minnkota saltwater 24/36 controller which is connected to 1 of 4 batteries in a series pos. to pos. neg. to neg both motors are the conneted together to the control unit. It gets hot and is starting to melt the wires that connect the motors to the controller, do i need to only run 1 battery or is the controller unable to properly run the current set being it is a 24/36 volt controller? any help?