truck electrical hook up on 1988

[shimcoelectric]

I have a 1988 (according to Brian) 10' co side dinette.....I have a round 4 plug on the front of the camper left side(bottom section)neer front sliding window... this is for heater, ref, and water pump...I also have 2 round 4 wire plugs on the side of the camper( top section) one is the inverter feed with marking lights.... the other is for interior lights 2 seperate circuits..on same plug....also have 110 v plug...... just wondering how it was planed to be wire the three round plugs to the truck or seperate battery...