[villagetinker]

I had used Google, but you can do the same with Amazon to search for replacement headlights, based on make, model, and year, if you do not have the replacement lights yet. As for the wiring, many of the golf carts I have looked at are a rats nest of old wiring and old connections. When I have helped friends and neighbors, I usually have to remove old wires and old connectors, and replace with new. I also go the extra step to apply liquid tape (Harbor Freight) to the new joints to keep them water tight.
If you are doing this yourself, I suggest LED lights, BUT, please make sure they are aimed correctly so you do not blind on coming drivers. Send me a PM if you would like a helping hand, I am located in the village of Pinellas, and would like the cart here so I would have access to all of my tools.