2021 3.7 AWD HR 148
I used the "underneath" method with one of the Noco 15A plugs. Nothing fancy - I reinforced the plastic Ford cover with a piece of wood glued to it, drilled through both, and then used some windo-weld to seal the whole thing back under the pillar. My van has a stealership spray-on protective coating which actually reinforces the plastic a bit too.But I'm rethinking @Checkswrecks method again now: I could put one of those on either side and join them on the way in... easier to get to and pretty attractive. I'm not trying to fool anyone into thinking this isn't an RV... 🤔
Now I've done it, I'm unsure if I'd use the "underneath" mount again. I've been down on my knees in the snow here in Calgary and I can imagine it being fairly muddy on a camp site. I managed to get nasty road goo (that brown mush from snowy roads) all over my jacket sleeve. On a do-over I might go rear bumper like Checks.