Start under the hood. Poke a hole in the boot/grommet where the hood release cable passes through the firewall. Pull most of your wire through there.
Open Drivers door. Pull off plastic sill, pull back driver's left footwell panel, unbolt bottom driver's seatbelt bolt and remove B pillar lower panel.
Open rear Driver's side door. Pull off plastic sill. Run your wire through the loom chase back to the driver's side seat back.
Unbolt driver's side rear seatbelt lower bolt.
Open liftgate. Remove plastic bolt cover in the middle of the wheel well cover.Remove the bolt under it. Remove the plastic tray on the top of the Driver's side wheel well. You will break off two internal tabs, but that's okay, as it will still snap back into place.
Fish a hanger or stiff wire down from the tray opening until it comes out in the rear driver's side door sill chase. Tape your ARB wiring to it and pull it up through to the tray opening.
Drill a hole in the wheel well cover where you want the receptacle to be mounted. Fish the wire out through there.
Make sure that you have plenty of wire to reach the battery under the hood, with some to spare. Make sure there is enough in the driver's footwell to replace the trim piece. Once you are SURE you have enough wire, cut off the excess ARB wire (and leave an extra foot for good measure.) I cut off a piece about four feet long.
Slip an appropriate sized heat shrink tube over the end of the wire about 6" long. Strip back the outer cover a couple inches. Strip back the red and black wire about 3/8". Put on the insulated connectors.
Connect the connectors to the back of the ARB receptacle. The red on goes on the center connector. Shrink the heat shrink tube.
Under the hood, remove the fuse from the supplied ARB fuse holder. Connect the red and black ring terminals to your battery (Red positive, Black negative.)
Use a VOM meter to check continuity of the ARB receptacle back in your cargo area. The outside connector should show continuity when the other probe is on a good ground. The center connector should not show continuity when the other probe is grounded.
If that's good, put the fuse back in the fuse hole. If nothing starts smoking or sparking, that's a good thing. Turn your VOM meter to DC volts, and check the connectors inside the ARB receptacle. You should have 12.X volts.
If so, plug in your fridge and make sure it is working. If so, great. If not, go back and check all connections, crimps, etc.
Put your positive battery terminal cover back on. Put on all of the sill pieces, seatbelt bolts, trim, etc.
Double check that everything is still okay.
Have a cold one!