Does anyone have a diagram of the wiring of a Sante Fe engine? My sons tried  to fix ours. They took it apart and it works when we connect the transformer wires directly to it, but I can not figure out how to get the wires back where they were. I have a black one coming from the front wheels. A brown and yellow coming from the light. And a red coming from the motor on the back wheels. Then two silver pieces on the motor with screws.

Any information on where to put these wires would be appreciated.

Thanks!