We have very similar, and I see yours are just as dumb.
We do the exact same thingI have fitted a trailer socket to the drawbars on all of my trailers, then use a flexi/coil with a male/male plug. Also used hamburger 12/24 volt leds on everything, ok for the vans and the lorries.
Bob
those boxes are threaded as well so you can screw in stuffing glands a proper job just used a dozen of them and fit 2 armoured cables in to them along with 2 stuffing glands for outside garden lights use wago blocks for the connections. there small neat and fast and can take apart for test purposes easily and refitThese joint boxes that are available from most of the wholesalers are good, more than enough room in them and what looks like a knockout is a rubber disc,that can be stabbed and the cable pushed through without the need for glands. Another upside is they are about £3.
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Ahh that explains why Indespension are closed. I googled them and saw they had gone. Will pop in Saturday. Hoping to get the wiring finished and then a test drive Sunday.Bank farm should have them and it's not far from work
Unit 1,
Millbrook Yard,
Neath Road,
Swansea
SA1 2JG