Here is a few pics of the rear drawer system that I have built up over the last few years. The whole system is built using 12mm ply and glued and screwed together with some 42 x 19mm pine bracing in the corners. The whole lot is carpeted in about 5 different shades of grey marine carpet (because it was built over a number of years and I couldn't remember what I used last time)
The fridge slide and surround (box) are a seperate unit and bolted on using about 10 x 1/4" bolts. Bolted to the left side of the fridge box is a small carpeted box that holds the butane cartridges and are wrapped in wetsuit style stubbie coolers, and the 2 portable gas stoves live directly below. This makes them easy to get at when needed. There is a top shelf that is bolted to the top of the fridge box and to the hand grip that used to be for the 3rd row seat, this has a drop down door to make getting stuff in and out easier.
There is a 90ah fullriver agm behind the r/h drawer (part of the triple battery setup) and a mega grunt 12v compressor permanently mounted to the r/h side, a 6 fuse distribution box behind the r/h facia panel. A 50amp anderson plug and 6B&S cable joins the rear drawer wiring to the front agm battery under the bonnet.
I have screwed on a couple of kitchen pantry spice holders to the outside of the actual drawers and these hold all sorts of things and on the back (facing the front of the patrol) I have screwed a cheap hold all from bunnings.
The drawers are held in by 3 bolts using the existing bolt holes in the floor and with and 3 stainless steel turn buckles and 'd' shackles. This has proved to be very effective in securing this setup and hasn't moved at all during our trips.
Greg