NEC Express5800/340Hb-R N8800-047F User Manual page 288

8-10 Option
8.
Slowly close the lever.
When the lever is locked, you will hear a click sound.
IMPORTANT:
NOTE:
9.
Attach the front bezel after installing all the hard disks.
10.
Set the dual disk configuration (see Chapter 3).
Be careful not to pinch your finger(s) between the lever and handle.
Check the hook of the lever is engaged with the frame.