Use a 2,0 hexagonal wrench to loosen
the two headless hexagon threads on
the coupling.
Lower the carriage to expose the screw
hole and secure the screw in place.
Elevate the carriage to reveal the screw
hole, then fasten the screw securely.
Reinsert the screw into the coupling,
ensuring the screw is tightened using
the top of the headless hexagon thread.
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