I recently purchased a 1970 Smokercraft with two 1972 Evinrude outboards a 6hp and 25hp. The 25hp is set up for electric start. The boat has the wiring harness but no plug on the harness to attach to the engine. Can anyone tell me what each prong is for on the engine so I can connect the wires? Or, does anyone know where I could get a plug that would fit this engine?