Ken, thanks for your comments. I went out to our storage spot (105 degrees here) and it turned out that there are two brackets on the bottom that can be unscrewed and the the panel will open. Hinge is at the top. The frame was bent enough that it took some effort to get it open. At least neither of the tanks was damaged. Wish me luck in straightening the panel frame enough to get a complete seal. We're just trying to leave for a trip to cooler climes. Thanks again.
