Figure
Use both thumbs as shown above to push the card into place. You should feel a slight resistance when there’s about a quarter of an inch to go. Press gently with gradually increasing pressure until the card snaps into place.
If the card doesn’t seem to align correctly, remove it carefully and try again. Be sure it is properly positioned in the grooves.
Now inspect the card. It should be firmly seated, the back plate flush with the back of the printer.
Replace the two screws you removed earlier.
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