We own a 2020 Buick Enclave and want to tow it behind our Class A motorhome. It can be towed on a dolly with the front wheels off the ground. It's front wheel drive. The Owners Manual states everything you need to do to tow it. My only, real question is why do we need to disconnect the battery once everything is hooked up and ready to go. I do not want to lose all the settings. What is the purpose in disconnecting it? Thanks