This wire has all the bullet connectors attached and run's across the front of the roof line between the outer and inner panel from the passenger side to the drivers side. From there it travels towards the back of the cab then down the rear post and is bundled up and suspended waiting for a connection to the fuse panel. The roof is not drilled for the lights but the wire is in place. You might try removing the sunvisor on the drivers side and fishing around for the wire. When you drill the large diameter hole for passing the connectors through to connect the lights, fish around between the two panels and you might just find the wiring already in place.

1963 C10
In the Gallery