Lexmark X422 User Reference Manual page 143

5
Place the optional card in its original packaging, or wrap it in paper and store it in a box.
6
Reinstall the shield. See
Reinstalling the shield
1
Align the six keyholes with the six screws on the shield.
2
Slide the shield to the right, and then tighten the screws.
Administration
Reinstalling the shield
Removing optional cards
143
for more information.