I didn't use the Blue Sea panel, but a similar one from Powerwerx. It's the same, but instead of an integrated power switch, I installed 2 OEM style switches connected to the dimmer circuit for illumination. It's overkill, but I like the somewhat factory look.
I mounted it all to the driver side taillight access panel. I made a harness with two plugs. One plug for the switches, and another for the power and ground feeds for the outlets. This way, if you need access to change the bulbs or remove the taillight, you can just unplug the panel to gain full access. The other side of the harness runs to the wheel well where I have a 6 fuse Blue Sea fuse block and two relays to power the panel and switches, and a constant 12v outlet next to the AC outlet to power my 45qt. fridge. The fuse panel replaced the AC inverter using the existing brackets, since I'll never use the practically useless AC plug for anything. The entire system is fed by 8AWG cables from my auxiliary battery under the hood to provide constant 12v power. Here's a couple pictures: