HI I'm new here, so hope I'm doing this right. I just aquired a 1972 Evinrude 25 w/electric start. The engine ID plate says S/N 25252R EO3399. Problem is some missing parts that I can't find in the evinrude parts book. On the lower front of the motor next to the choke knob is an empty hole. Behind this hole is a junction block for starter connections. Apparently there is supposed to be a starter switch or button there. Any help finding the parts I need will be greatly appreciated.