1974 duster seat belt interlock module removal

i am replacing all wiring, and wiring to seats disappeared 2 years ago,i got voltage at coil and have voltage at ballast, can start car at starter relay by crossing it over, burt cant get it to turn over with key, i dont have safety neutral switch hooked up, but i don't think that would stop cranking by key if i can cross it at starter relay, the car had the aluminum relay on inner fender that you had to reset it if it wouldn't start , it had 3 wires going to it, i think thats where they said you coud cut the yellow wires and wire directly to starter relay and remove it, but all that corrosion is green in that module under the dash and i have no ideal what all those wires go to,some are large gauge and they want $60 on ebay just for a used module, and i'm not sure that would cure my problem