This 1965-1973 Mustang backup light/ safety neutral switch harness is used when installing a T5 5-speed manual transmission and will work on Borg Warner, Tremec, and Tremec TKO, TKX transmissions.
No need to cut or splice your factory wiring harness, this part plugs right into the transmission switch and under the dash harness on manual cars.
Note: This part may require running wire to the back for early 1965 Mustangs. This harness connector is a modified version of OEM# C5ZZ-15520.
Worked as needed. Did not have to cut my harness.