What do I need besides a rocker switch?

Recently I installed some lights on the truck and have this switch that the lights came with. Looking to upgrade it to a @OTRATTW rocker switch. specifically ( https://otrattw.net/CONTURA-V-REAR-LIGHTS-UPPER-DEPENDENT-LED-ONLY-V1D1BT0B-PZC77-54R.html ). The current switch lights up only when the lights are "on" so i figured i'd go with this one. My question, what else besides this switch with rocker attached if anything do i need?

 

Did the lights come with a relay.
Lots of relay love on t.w.
Other than that maybe a bracket for the lights? (But as you said they are installed so doubt you need one)

 

no relay. it was direct red wire to battery and black to ground. essentially plug n play

 

Just make sure its got a fuse

 

will do!