Fitting reversing cameras to coachbuilts

I have written an article on how to fit twin replacement reversing cameras on my Nuevo, and it will work for other coachbuilts with the moulded fibreglass rear panel where there is a gap between the interior bodywork and the exterior fibreglass. You need to know what goes on in the gap, and how to run a new wire from there down to the chassis and up to the rear view mirror area.
Anyway this is about the fourth or fifth A/S related article I have written for MMM so if you want to know how to remove the single camera and fit a dual one, or a new single one, get the magazine.