Please send me two pictures. The difficulty lies in how to disassemble the battery. It's not easy to work on from below, so I recommend using flux. Don't worry, if it's really broken, just find a copper sheet nearby and solder it for grounding.
I bought a battery box to save time, but it has some drawbacks. Sometimes, when moving or transporting, it's easy for the contacts to become faulty. However, the main advantage is that you can simply replace the batteries whenever needed.
I'm too lazy to keep fiddling with it, so next time I'll make sure the cable organizer is mounted in a convenient location where I can easily replace it without having to remove any screws.
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