Hi Jason,
The high current connectors are called "Anderson Plugs"...Available on Amazon or Ebay..
I just added two more features....
Another Anderson Plug and a 150A reseable ciruit breaker to run my receiver mounted winch on the rear of the truck
And a lower current set of anderson plugs to connect a 120V-AC Optimate charger when the box is in storage during the off season.
You can check them out here
www.rvbprecision.com
Only thing left to do is add a standard cigarette lighter socket for devices that require this type of connection.
There are two phone chargers....The one in the RTT is a simple round, panel mount device that has two USB sockets. I made a little box for it in the tent.
https://images-na.ssl-images-amazon.com/images/I/61SypGOXiOL._SL1500_.jpg
And the other USB charger sockets are integral with the solar charge controller. Mounted right on the front of the unit.
https://images-na.ssl-images-amazon.com/images/I/41ge3LHcHsL.jpg
Hope this helps!