Thanks!
I'm not familiar with the 06's, but in my Gen 2, I accessed the rear wiring harness through the jack compartment.
I tapped into the wire powering my stock back-up lights and ran that all the way to the front dash where I have a switch installed. I used that wire to power the switch which I have on my dash.
From the switch, I ran the power wire back to a relay (pin 85).
From the battery, I ran a hot wire back to the relay as well (pin 30).
I put those three wires into a long length of split loom that I ran all the way from the back of my tail lamp housing, under the trim work, under my door sill, and up into my dash to protect the wires.
From the relay, I ran two hot wires from one connector that I had attached to the 87 pin. I then used more split loom to run the wires down to each of the aux back up lights.
I ran the ground wires back up the split loom into my jack compartment. I drilled a small hole into a part of the body behind the trim and used a sheet metal screw to attach those ground wires and the ground from the relay's 86 pin directly to the body. I sanded away the paint for a good connection, but touched up everything after I had the grounds attached.
The ground for the switch was run back under the hood where I have my other ground wires installed.
I of course installed an in-line fuse between the hot wire and the relay.
As for the lights themselves, on the gen 2 steel bumpers, there are nice holes that I bolted the lights into and they've held snuggly for almost a year now.
Here are a couple before and after pics to show the difference in light given off.