Under normal circumstances, the 2 bottom screws go to the transformer, and the top screws would go to the track. I believe the bottom left screw and either top screw will work. If it's dead, flick the reverse switch. A quick check with an ohm meter will answer that. Whatever side reacts to the ohm meter will be the screws you need to connect to a spare stock Tomy controller plug. The only catch is the reverse button will only work in that one direction. Make sure the ohm meter reacts to the variables of the steering wheel. The other side of the controller will just be "on".