If your battery disconnect system uses a magnetic latching relay, then the disconnect switch is a 3-position DPDT (ON)off(ON) type switch, with spring return to center. Pressing it one way applies voltage to the latching relay one way, pressing the other, the other, and magnets do the switching, This is a fairly reliable system.
HOWEVER Somewhere there is a fuse, likely 5 amps. ON my Gasser, with an Intelletec BCC it's inside the BCC box (Same box houses the relays) under the "Hood" and it is on the bottom row as I recall, however..... no guarantee it is there.
Page 2: On my coach the switch failed, Oh it DISconnected just fine, but reconnecting, No joy... Pulled power off the switch (Pull fuse) and operate like 50-100 times both ways to clean switch contacts, restore fuse and if luck is your main squeeze, it just might work.
Home is where I park it!