Usually near the fresh water tank or the bathroom under the sink cabinet. Look for a flat panel with screws in it. They are often covered with a removable panel so you can get in to winterize.
Hint for the noise. When you find it, remove the mounting screws, put some little rubber squares under the mounting feet and reinstall the screws. Will remove the vibration from the motor and help reduce the sounds like it's everywhere feeling.
2020 Chevrolet 2500 LTZ, 2019 Forest River Wolfpack 23Pack15, 2014 EZGO Golf Cart.