You can see the printed circuit board with all the electronics.

Always prevent the pan edge from scratching the isolation of the enameled wires between the yellow wire and the blue wire.

Do never go with conductive tools into the wiring maze between the cell heads and the electronic board, or you may cause a catastrophic firework that you may regret. Do not pinch or bend the electrical interconnection structure between the cell heads as long as you don't know what you're doing.