Each of those switches operates a big relay (solenoid) that does the actual disconnect of the battery power. The relay requires power to operate and is normally powered direct from the battery with its own inline fuse - that may have blown.
It's possible both relays are bad, that that seems too much coincidence to have both fail at once.
And I suppose I should add that the batteries have to be ok to operate the disconnect relays. You can't disconnect a dead battery via the switches.
Former owner of 2004 American Tradition and several other RVs
Home is in the Ocala Nat'l Forest near Ocala, FL
Summers in Black Mountain, NC