Love the location for the rear camera. I had mine in a similar position on the Tiger but I made my own bracket for it because I seem to remember that it needed to go further down or the view would be obstructed. It looks like a standard "L" shaped one from B&Q will do for this one. I hadn't considered that, so thanks for the illustration, very useful. I was trying to design I bracket for under the luggage rack but I shall give this a try.
The front one, though, doesn't that position severely restrict the view of the right side?
I will have a look at your link so these questions may be answered already. Where did you get the feed from? I have just bought a BMW harness to female USB for the power feed to the control box (I could have bought the same with a mini USB plugging directly into the control box but I wanted the extra length of the supplied USB just in case I needed it) GZM-QLITE-CAN-04 from Nippy Normans. The great thing about this harness is that the poutput is 5v thereby eliminating voltage converter.
Where did you locate the control box? There's not a lot of room under the seat and it's exposed to the elements under there. I could fit a kitchen sink under the Tiger seat and it was weather proof (if you taped up the holes for the luggage system). I have an aluminium bracket for the handlebars but it too is exposed to the elements there as it would be screwed to the bracket. I'm not over keen on having yet another screen in front of me, TBH, even if it will double up as a rear view camera.