Hello everyone. I bought an old evinrude 15 hp Im guessing a 60s model. It has an electric start. It has a three prong connection on front of motor for im guessing wiring harness for key which did not come with it. Would the key give the spark to motor? if so where could I purchase this harness . also i dont know where positive battery cable hooks up to motor. Plug in on front of motor has one wire to starter red. one wire to ground black and one wire to electric choke any help would greatly be appreciated thankx frank d.