Spot light help

I have done a search but couldn't find what i needed

I have put some spotlights onto my roof rack and want to wire them up to a switch wich i have in my centre console
I have electrical connectors wiring etc and i also have a 12v 30a hella relay to put in

Could someone be kind enough to guide me on how to wire this up to my switch many thanks

And i know this has probably been done before

Thanks
Stu