NEC N8100-1422F User Manual page 327

7.
Slowly insert the device into the slot from where the optical disk drive has been removed
with the release table on both sides of the device.
Push the device until a click occurs to lock it.
8.
Remove the two screws from dummy cover of the additional slot 1 to remove the dummy
cover.
IMPORTANT:
Keep the removed dummy cover for future use.
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