Dennis,
One of the battery switches should be labeled house and one chassis. The chassis one will turn off the power to the driving console and starter circuits. It uses the two starting batteries, usually group 39 12V. The house one feeds the 12V items within the coach like the frig, overhead lights, overhead fans etc. That is fed by the four or six 6V series parallel golf cart batteries. You could test this with each battery switch.
Later Ed