Connect the wire from your switch to the power wires on your lights.
How to wire roof rack lights.
Slide each end in a crimp style wiring connector.
Some roof rack manufacturers may have optional light bar mounting brackets like this rola titan roof tray which makes installation as simple as spinning a few spanners.
While mounting a light bar on the bullbar is often easiest the roof mounted option is far more popular freeing up space on the bullbar for traditional driving lights.
Ask an expert wiring roof lights duration.
Use connectors if they are supplied with your lights.
If your lights do not have connectors included strip a half inch of bare wire from the end of each power wire using your wire strippers.