NBS Technologies Advantage M8 Operation Manual page 40

If the remaining card is not on the Carrier, turn the Knob (X) to carry the card toward the Carrier.
Turn the Knob (X) clockwise to
carry the card to the right side.
When you cannot access the Carrier, grip Knob (Z) and pull the Carrier forward.
Turn the Knob (X) counter-clockwise
to carry the card to the left side.
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