Jack,
It's too dark to try to take current pics, but I found these on my computer. Pics are 2 years old, and my set up has changed during that time, but these should do the job. Forward cabin is still mounted in the same area. Cargo cabin I remounted several inches back because it was getting wet when it was raining and my cargo door was open.
Both plug things are from radio shack. The plug unit comes with a hardwire cord and a 12 volt cord. However, in my opinion, using a 12 volt cord to run three more items is not a good idea. I prefer hardwiring. Mine are hardwired and I can run a max of 30 amps through each 3 plug unit. They come with an inline fuse. They are also fused at my marine panel and again at the battery with a 30 amp fuse (those flat green fuses that are in a pocket -- I always forget the name of those kind of fuses.
I have replaced both of these over the years just due to daily consistent abuse. Both are securely mounted with bolts and nuts. One of the things I like about these units is that there are 2 screws that hold it together and if you unscrew it and open the unit up, and very carefully use a drill through the internal screw tunnels - you can continue to drill the hole through the entire case so you can easily bolt it on to whatever panel you attach it to. The forward plug is totally out of the way and never interferes with passenger travel where it is mounted. As you can see, you can tuck cords away neatly up under the panel after securing them with an electrical tie.
Just a word of advice, if you start adding electrical stuff, get one of those tiny pelican cases and start carrying spare fuses for every single piece of electrical equipment you carry -- especially at the beginning because you'll probably blow a few fuses at very inconvenient times until you get all of the kinks worked out of your set up. John Lee made that recommendation to me and carrying those spares in a dry, safe, convenient place has saved my butt on more than a few occassions.
I'll go see if I have a pic of my spare fuse set up that I've accumulated so you can see what I'm talking about. If I have a pic on my computer, I'll post it.
Anyway, hope this helps. Good Luck
Jamie