NEC Express5800/120Rd-2 Service Manual page 285

Remove the extension slot cover.
6.
Keep the removed extension slot cover for future use.
NOTE:
7. This step is required only for a PCI board of the full-height/full-length type.
Before installing a PCI board of the full-height/full-length type, remove the retainer from
the PCI board, and then unlock and open the card retainer clip on the other side of the
guide rail.
Retainer
Board
retainer clip
Hook
Lock tab
Disassembly and Reassembly 7-41
Hole