Many of the lights are wired with wire nuts. Super easy to wire in if you can pull the shroud around the vent and drop the light- likely there is room between the ceiling and the roof, like in our camper.
I just did one this summer.
I recommend replacing your light bulbs with LEDs. Sometimes more than one light is on a circuit, so you want to do all the lights on that circuit at a minimum (should do them all, IMHO).
In our camper, that gave me comfort that we wouldn't overload the wiring or circuit when we added the very low amp usage- Fantastic Fan.
I did have to order a new inside shroud as our vent had rounded inside corners and the Fantastic Fan had square corners.
Just be careful when setting your fan in place that it is level and not twisted or bound...or you'll get vibration. The screen that mounts over the fan and opening is more sensitive to any twisting as it has little structure- only the plastic frame.
That's it. Pretty simple, if you are using a Fantastic fan ;)
Good luck!
