I put the Mopar lights on my truck. It's not too difficult to do. The biggest issues are wiring per the directions, interior parts removal and locating the template.
I did see a wire going up one of the pillars, but there are no plugs on the harness. I kinda think from reading some interior mod threads that wire is for an auto-dim mirror. I do believe somebody mentioned it wasn't powered unless the headlights are on. So if you don't have an auto-dim mirror, check it with both headlights on and off, and you might not need to go back to the fuse box.
The interior parts removal requires some big Torx drivers for the seat belt anchors. The coat hanger hooks are pretty brittle, so don't feel bad if you break one removing it. They're not costly and can be replaced after everything is re-assembled.
The template is a bit sketchy, but just take your time. After you think you've got it located, place the light housings on the template and look around and from the front to be satisfied they're properly located. A knockout tool would be best, but I used a metal hole saw. It made a slightly bigger hole from skipping a little until it started cutting (even with a pilot bit). The housings are ample to cover it up. It's not a bad idea to use a bit of silicone sealer on the gaskets, either.