A word of advice, watch where you drill your hole for the camera to poke through the light. I used a dimple that was centered on the plastic center brake lens, and when I went to install the camera it was in the way of the 3rd brake light bulb, not allowing me to twist and lock it back into its place. I am currently waiting to get some very short led bulbs to try and make it work again.
If I was to do it over again, I’d probably move below that indent, and also make sure to angle the hole I drilled downward more. As when I finally finished, the camera just barely saw the tailgate, and the adjustment built into the mirror was all the way down. I’d rather have aimed a bit lower, and then adjusted the mirror back up slightly, but I couldn’t at that point.