Thinking about adding a 2nd AC

I just installed a second AC on my 5th wheel and it was not pre wired or 50 amp. Yours would be a piece of cake. 4 long bolts squeeze the unit and gasket. Since yours is pre wired, should be 3 wires already there, black, white and green. I backed my pickup truck up to my trailer. Placed a ladder in the bed and angled it to the back of the trailer. A buddy slid the unit (still in the cardboard box) up the ladder while I pulled. Not too bad of a job.