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 the 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"