If you have a 7 pin connector on the coach, one of those is for charging the toad battery. I don't use a fuse switch, I just make sure everything is off. Even if i should forget to turn something off, the MH will keep the battery charged. One other suggestion, I use a rubber band on my valet key so that when we stop at a rest stop and turn the toad off I clip the key to the coach steering wheel. It's probably not necessary to take the key out, it just makes me feel better.
Paul, Kathy, and Tux a 4 month Mini Schnauzer
2014 Tiffin Phaeton 42 LH, 2013 Honda CRV
"When the time comes to look back, make sure you'll like what you see"