Here is my revised box
From the box there is a ground, power, and 6 wire cable (not shown in picture). When you want to connect a new accessory, like a light light bar, all you need to do is route the wire into the box and connect the power and ground to the distribution blocks.
The power wire leads to a 150 amp breaker, which then is attached to the battery. When the dealer complains that your aftermarket accessories are creating an issue, all you have to do is hit the breaker and everything is disconnected!
In the picture you can see the four relays and the ground post.
Under the panel on the other side of the box you can see the fuse block
In it's final position on a 2012-2014 JK.
The 07-11 JKs have their battery turned a different way so the wires will exit the box a little differently on them.
Here is my wife's dirty engine compartment on her 08. As you can see the power needs to come out if the left side of the box and the ground from the right.
The 6 wire cable that is fed to the driver's side a pillar will have 1 ground, 1 constant power and 4 wires to control up to 4 accessories.