Need to remove this old 80's range but can't figure out how it's attached. I can see the small spaces between the sides and the cabinets and there are no screws. Also it's no attached on the bottom as there is just empty space below it. That only leaves the back of the range...must be attached to the wall but how? how do I get to it? called Jenn-air and they have no manual and can't find one online. Please help! Thanks, John