Must be getting dumber with age.
I can't get that thing to move down the rails after removing both bolts. How do I access the batteries after removing the bolts?
You may need to lift up to disengage the slides then pull out.
The box doesn't move. To describe it better:
It looks like the piece on the front of the tray that goes over frame has to slide out 1" and it then looks like it will release down and slide out. There is no movement when I push up, pull, push, etc. It seems as if there is something else securing the tray in place, but I cannot see it.