I can't comment on the 45" shaft but you can certainly wire a 3 wire motor to a 4 prong plug. Find the ground then test which prong is 12V and which is 24V. Then you can place the wires accordingly.
Mike
I have a 02 882 and the trailer vin is on the inside of the frame right around the spare tire mount. It is has been painted over, it may be readable still