Up to now, we have always passed an extension cable through the side window when we wanted power in the awning but, not to be outdone by a certain cactus grower, I also decided to fit a socket inside the external locker on our Triton.
Our van (a 2003 420) has the kitchen in the sharp end and the fridge immediately to the left of the entrance door. As I was unsure where to pick up the supply for the socket, I emailed good old JohnE who suggested I use an existing junction box accessible from behind the top external fridge vent. Well it would have been accessible if I hadn't fitted a couple of fridge fans behind it a couple of years ago.
So I took the worktop off the fridge, connected the cable into the connector blocks and ran it over the wheel arch to the new socket in the locker.
Dead easy.