Some additional thoughts:
1. If you are going to let your TM sit for a while - maybe a week or two - don't just plug your TM into house power and leave it, thinking the onboard converter-charger will take care of the battery. The converter-charger does a great job of providing lots of charge current when it is needed, but isn't so good at fine-grain control of small current. Some of them eventually overcharge your battery, some eventually undercharge it. You want to avoid both.
2. You didn't mention the model of your TM, but if it is one with the battery in the rear compartment, it can be kind of annoying to get access to it to pull the fuse and/or make connections, especially if your TM is backed into the garage, blocking access to the rear compartment. If this is your case, you can be a little fancy and arrange to charge the battery through the Bargman connector (the 7-pin connector that you plug into your car when traveling). It makes things easy. When I finish backing my TM into the garage, I just go up to the front end, and plug the Bargman into the matching connector coming from the Battery Tender. There is some good info here, along with photos and details in the later half of the thread.
https://www.trailmanorowners.com/for...ner#post118140
Bill