[Daryles]

Been there done that...
If you look at your hydraulic motor and reservoir, they are mounted to a bracket.
The bracket is mounted to the wall. Undo the front screws of the bracket/wall screws and see if that gives you enough tilt to get the battery box Lid off.
If not take another screw out etc.
Once you do get the lid off, I moved the battery box forward to the front of the compartment. (there are screws in the bottom of the box mounting it to the floor).