I think this was from a 2000 10.5 BF I put floor support in this years ago hope it helps a little
dropping these tanks not easy the top supply and vent connections are XXXXXXto disconnect on the top with lousy access to them and repositioning the tank back can be a bear !!!! the hanging straps usually have a short lag bolt through a washer or metal plate then the strapping into the bottom of the floor be careful reassembling the floor is not solid material and the lags ment to go into areas of flooring a that have reinforcing
a deep search of my past posts you will find many posts with pix of other BFs I worked on there should be some of later a 10.6 and a 10.5