Options for a reversing camera

[HPsauce]

OK, no thoughts, negative or otherwise re the rib, so I'm going ahead with the central position; started marking out this morning.
As I have a spare backing plate I'm not worried about minor errors, though hope there will be none! Intend to use the spare and keep the original to revert if the camera is ever removed.

A couple of observations:
1. My 4-rings badge isn't central! Maybe a couple of mm left of centre. Coupled with the odd extra badge (4.2 now removed) found when I bought it and the slightly misaligned S8 badge suggests repair work or at least a respray?
But with all the trim off I see no evidence of that.
2. Decided rubber well nuts will be good for securing the camera as well, so looked at buying some more. Need M3 bolts to go through the mounting slots and ideally a shorter type than the 25/30mm version I used on the light.
Oddly, of all the combinations available the M3 type only come in that single longer length, but it will do OK so ordered a small pack complete with bolts.

I'll hold off on cutting holes until the well nuts arrive, I don't have enough at present.

The photo shows where it will be fixed, not quite taken square so the offset of the 4-ring badge is exaggerated a bit.
The larger circle (12mm min) will be cut out to feed the cable and plugs through with a smaller cut-out at the edge where the cable will sit when fitted (also allows a plug to pass a cable during fitting).
There's a single 3mm dia cable leaving the camera and a junction unit (max 12mm dia) about 500mm along then two 3mm cables (power and video) each with a 12mm dia connector on the end.
The slots are the holes for fixing screws, they will need 8mm holes behind for the rubber well nuts. The slots themselves are about 8mm long.
You can also see the location of the top centre fixing for the backing plate (just above the numberplate), conveniently slightly offset to the nearside.