80 4 speed backup light wiring

Jun 15, 2016
Eden Prairie, MN
hi everyone
Putting a Muncie 4 speed in my 80 Z28 while I am getting the engine rebuilt. the guy before had put a hurst shifter on his Saginaw, I’m putting a hurst shifter on my Muncie. Backup lights didn’t work before and I want them to work. What all do I need to do to be sure that they work? Any help or suggestions would be greatly appreciated thank you.