Advice please. I need to take the rear bumper off to do some dreaded rust repairs. Do I need to remove the sensors from the bumper to take it off or is there a main loom I can disconnect that feeds them all? Any help is much appreciated.

Hello, long time lurker here but never posted.
So ive had my Bongo for 4 years now and until last camping season i didn't realise that when on site the leisure battery doesn't have a charger when we are on EHU (id never thought about it till we had a flat battery after 5 days)
Id like to install a ...