Help Please

 Hi I hope someone can help please, just picked up our Autosleeper Eton yesterday and looking around this morning I noticed a couple of things that I can't identify. The first photo shows a the bottom rear of the drivers seat, can anyone identify what the little "box" with the red cap might be for? The second photo shows what I think is a "Retro Fit" addition on the dash, is this an alarm sensor of some sort?
Looking forward to hearing back from you all and thanks in advance.
Cheers
Steve

The little addition on the top of the dash (photo 2) looks like it could be the monitor for something like retro fit reversing sensors.  I can only guess at the box with red cap...something like fuses for the leisure battery if that is under the seat.

Good luck with getting to know your van.