Do you mean the one that adds/reduces spring tension in the arms? If so, open the wire so the arms are free and move the brake arm on the side you need to add tension on away from the wheel and towards the floor.
@Irishane started
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Do you mean the one that adds/reduces spring tension in the arms? If so, open the wire so the arms are free and move the brake arm on the side you need to add tension on away from the wheel and towards the floor.