Betngreg

Hi
I also am setting up a 2017 Edge to flat tow. The car manual says to unhook the negative terminal. The negative terminal looks like a pain to get to. It appears to be under a ceiling panel in the rear of the battery with the positive terminal being toward the front of the battery and easily accessable. How do you access this terminal or do you unhook the positive?
Do you have problems with other electronics by doing this?

Thanks

Dave