vespa pk wiring loom

i was wondering if there is anyone out there to help me? im currently restoring 2! vespa pk50s models both without electric start and neither of them have a stator or wiring loom? where do i begin there are so many variations! i wonder if someone could help me and point me in the right direction. i know they both have rear brake lights, indicators and headlamps. only one has a controll light in the middle of thehead set. oh and yes they are both 1984 models.

adam :P