So I'm pretty sure I'm going to relocate the license plate here. I'm going to fashion a panel out of ABS plastic that attaches to one of the Rotopax bolts under the spare tire, and then use two plastic Maglite clips to fasten it to the vertical tube.
On top of that, perhaps with a supplemental license plate bracket, I'll mount the license plate. Also utilizing the LED that came with the tire carrier, and also allowing me to shorten the wiring and neaten it up a bit.
It'll make sense when I'm done. It'll hopefully look halfway decent.