Scubawise, you asked for pic of ATS placement. See attached photos.
1. shows location of screws holding in my "magazine rack" After removing screws, the "magazine rack" was jammed in tight but did come out with little coaxing. I only put 2 screws in it (one on each side) when I closed it up the first time I removed it months ago. The two have held it in place without any issues.
2. shows "magazine rack" removed exposing fresh water holding tank.
3. shows location of ATS and water pump. You just about have to stand on your head to remove screws at four corners of ATS.
Hope these help.
Mike