[jagizzi]

So, your breakers:

Main is as it sounds, basically allows power to flow into the breaker panel to the other breakers, at least on my 2720.
20A no clue which one but one is your converter, the WF8955. This is both your battery charger and the 12V supply for all of the trailer
20A One is your AC. You can figure out which one by setting the AC to on and then flipping breakers on until the AC actually turns on
20A Another one would be for the outlets, and you still need the fridge in there somewhere, and the microwave and the water heater. Not sure how you are wired

You will have to flip breakers looking for what turns off or on to see what they are hooked up to, and then label them. Note that I have 6 breakers so that the everything gets its own breaker. I simply installed the double breakers into the positions that held singles, easy peasy to them move the wires to the new breakers.