LD and RD is left hand drive and Right hand drive. If you are referring to the tail light harness, it appears in the assembly Manual the it runs attached to the cab.

A PO has run mine inside the frame, but now I need to take a closer look for the clips that are spot welded to the cab floor panel.
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Last edited by Phak1; 07/23/2022 10:33 PM. Reason: Added documentation
Phil
Moderator, The Engine Shop, Interiors and Project Journals

1952 Chevrolet 3100, Three on the Tree, 4:11 torque tube
Updated to: ‘59 235 w/hydraulic lifters, 12v w/alternator, HEI, PCV and Power front Disc Brakes
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