Jeff,
Power source for the four large terminals in your Front Run Box.
Top two terminals (with the buss bar) are switch power from the chassis battery bank.
Bottom driver side terminal is switched power (battery disconnect and ‘salesman’ switch) from the house battery bank.
Bottom passenger side terminal is always hot (not switched) from the house battery bank (powers CO and smoke detectors, radio memory, etc.).
Looking at the backside of the terminals, the top passenger side terminal should feed the generator starter circuit and slide room hydraulic pump.
The diagram that Mike posted above should be accurate for your coach.
Unless the ‘salesman’ switch is activated, terminal three on our AGS is hot, indicating that it is monitoring the house battery bank. Also, to add to the inconsistency, terminal three wire on ours is white. I do not know where the other end of the sense wire is tied into the system.
CORRECTION: The ‘salesman’ switch does not affect terminal three on our AGS, it always reads house battery voltage.