Bob,
Is your battery compartment exposed to the rear tires? It was so on our 2007 when we bought it. Long ago, I reconfigured the battery cables
SHOWN HERE to add a shield which worked out okay. It was not as smooth working the battery tray afterwards, but it was still better than all the road grime and pavement water going all over the battery terminals & cables, the tray, and drawer glides. I completely resolved the cable bend resistance when removing the battery tray and installing the two taller AGM 6V batteries. Without a battery tray, my PC battery compartment today
SHOWN HERE requires maintenance-free batteries which I am perfectly fine with.
With one 12V AGM battery in the tray along with a protective shield, the only time you would slide out the tray is when replacing the battery. And with one battery and lots of extra room, the cables will be easier to handle when operating the tray.
If you wonder, our 6V AGM batteries are notably heavier than my 12V wet acid batteries were. I bought them (Duracell brand) from Sam's club at about twice the price of conventional lead acid deep cycle 12V batteries. So far they have lasted more than twice that of our old 12Vs, and they are not problematic yet. Also, they hold a lot more energy for boondocking which I realize is not important to you.