Having removed my battery servers times....there is no way you want to use a tray like this with sides on it....our trays are flat......if it had sides (like pictured) it would be one bitch of a time trying to change it....you would have to lift the battery up and out of the tray. Not enough head room to do that and besides that our batteries are heavy. I have to lay on my side and and just trying to disconnect the cables and side it is out is a chore.....if I had to add lifting it up and doing that would be just about impossible.
I posted these only to show the hold down strapping methods used that would accommodate different heights