Reverse Lights in Converted Transmission

I recently bought a 2002 MK4 Jetta and I noticed the reverse lights don't work. The car was originally an automatic transmission, but was swapped to manual. Is there a wire I need to cross or something to make the lights work?

Anything would help! Thank you.

Yes. There is something amiss with your wiring. Consult the wiring diagram that you have the opportunity to purchase.

Look up, kill da auto Wabbit, and you can find the info.
I don't know why so many think we should but the book, it's basic information that's available.

Thank you!

check the bulbs first.