73 340 Single wire coming from the firewall ?

Arron tate said
Hello flathead31coupe.
See attached picture.....
On mine it goes to manual transmission clutch petal interlock switch and then to starter relay.
It provides the battery negative to pick relay when clutch is depressed.
Note: Mine is a OEM manual transmission car.
Hope this helps
Happy Mopar :)
Arron.

View attachment 1716288664

Thanks.That helps when I purchase the car.It's a factory three forty h code car But it did not have a fender tag It has a 4 speed and and what looks like.The wiring for a 4 speed.. I have no documentation to prove it so the Mystery Continues deciphering wires.