1999 Windsport Thor Class A motorhome Batteries location etc. Read description.

On the switch that says Chasis battery. Push the part that says connect to start the motorhome. Once you start the motorhome, go back and click disconnect so you don't forget it plus it will save the life of the relay coil to stay energized, meaning it will get and stay hot. So push the disconnect part of the swtich. I didn't mentioned this clearly in the video.
I hope this helps someone.