NEC Express 5800/320Lc - Manual (Page 333)

8-32 System Upgrade
7. Close the release lever.
The installed PCI module will start automatically.
IMPORTANT: Unless the release levers are located inside the rack frame, the
module won’t be mounted correctly.
8. Screw the release levers.
Release lever
Wrong
(The hook is located
before the frame)
Correct
(The hook is located
behind the frame)