The extra wire has been cut, and the trench has been filled with UV resin.
https://m.g3l.org/system/media_attachments/files/112/861/697/649/228/879/original/70cd346f8d02538a.jpg
Also, I noticed the pad for the negative battery terminal was so gone that the pad left on the other side didn't connect anymore to ground. I had to dig the epoxy to find the ground plane, and solder a wire to it.
Can you spot the wire on the last photo?
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