Brady Minimark Manuel D'instructions page 6

7. Turn back the print head module and then insert the bare core into the
pick-up holder. (First snap in the right side, then the left side).
8. Turn the wheel of the print head module to ensure the ribbon is tightly
wound.
9. Press down the print head module on both sides firmly till you hear a
click on each side.
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Wheel
Print Head Module
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