Dual battery locking tool box for travel trailer

I'm not sure how the batteries are going to slide around when I secured the battery boxes themselves to the box?

At most, I should still come up with a strap solution so they don't bounce.

I didn't see that in the one "designed for the task at hand" either... Looks like a smaller version of my box with a simple pad lock on the side to slide the top off.

Anyway, thanks guys... I should have known better when I decided to post this...

Mitch