Curious about what you are going to use.. got a link?
Grille inserts:
https://www.extremeterrain.com/drake-grille-inserts-tj-jp190018black.html
Trailer marker lights:
Partsam 2PCS 3 LED Truck Trailer Front Rear LED Side Marker Lights indicator Lamp Sealed & Waterproof Surface Mounted Installation Amber 3.9" https://www.amazon.com/dp/B00YLWX0SC/?tag=wranglerorg-20
wiring harness:
https://www.extremeterrain.com/raxiom-led-switch-kit-j100996.html
OE gang rocker switch:
Fits The Jeep® 1997-2006 TJ/LJ Rocker Switch- Zombie Lights Logo https://www.amazon.com/dp/B00FGXF2Y0/?tag=wranglerorg-20
I thought about wiring them into the passenger marker and just having them as running lights, but I also thought I might like to have independent control of them and for the low cost and effort, I’d rather not monkey with my factory wiring.