Thanks very much MattB4 for posting your experience with this mini ex. I bought the same model about the same time as you but have still used it very little. The battery position is incredibly dumb. I asked Typhon Machinery how to remove the battery and they sent instructions for the open model. When I pointed out that their instructions didn't work for the cab model, they admitted that the cab had to be lifted to remove the side panel to get to the battery. They sent a video link. Hopefully it works on this forum (a Google drive download):
3453_1761635669.mp4.zip
It skips over what to do with the wiring. However, I think the cab only needs to be lifted a few inches to get to the side panel bolts so it may not be necessary to disconnect the wires.