Step 9Attach Battery Board
Once you are happy with this, remove the main board and thread the wires from the battery board through the hinge piece and cut them to right length ready to solder.
Too long is definitely better than too short (you can always loose the excess under the hinge).
Solder the wires from the battery board into their appropriate places.
Put in some batteries and test the circuit one last time before we insulate everything.
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