What I have taken (and Chas kindly posted) is the passenger side CupaT day gull wing internal fittings - T making equipment etc for a quick stop. There are a couple of small shelves with rubber 'grommets' that hold things in place on the shelves and stop them falling out, never lost an item even while going over mega rocky ground. etc. There is a hatch on both sides that open into the storage area than runs across the back - that holds a fold out chair. Visible on the other photo - also there is a top shelf that hold a working bench, useful for cooking etc held in with bungees and placed on rubber/foam matting that stops the rattling and these are also used to stand on when having a shower... so no mud or sand on your feet etc.
You can also see the compressor outlet, shower (unfiltered for power flow) and drinking water (filtered)
Those people who have fitted draw units know there is space that is hidden down the sides this space and this edge draw line was picked up by the ally side units that runs to the roof shelf. All the internals are ally covered with the usual carpet stuff with spray on glue etc.
The side units have false floors to allow access right down to the rear of the wheel arch (2 levels down) - useful to keep all my car spares, bearings, gaskets, filters,(oil, fuel,air) belts, hoses, large spanners, jump leads etc etc. all hidden away.
The other gull wing (not shown) is for the overnight stops - hold the cooking equipment, plates, kelly kettle, potjie pot, cast iron stuff that goes on the camp fire. The lower compartments again accessible by false floor hold the plates, bowls, spare gas canisters (8) gas cooking stuff (if no camp fire) - third level down holds the compressor and some other car spares.
The draws - one holds the bigger car spares, alternator, starter, clutch(yes) etc etc..plus a box full of cooking spices. The other draw holds all the tools for everything possible - I do keep adding to this draw after the odd issue (and find I need the 'must have' tool etc)
The center (empty section) above the draws - is sized for storage boxes for oil and wet stuff fluids plus my own clothes bag and overnight hotel) bag.
The idea being everything has it's place - nothing rattles around - and I know where everything (well most of the time) and everything gets put back after use.
That's it... water, fridge, freezer, additional batteries, electrical panel, water filter, pumps, first aid stuff etc etc... all held in the rear seat area (rear seats removed)....
Denboy