NEC N8100-2189F User Manual page 83

Chapter 2 Preparations
8. Remove the dummy tray from the HDD cage.
9. Unlock the handle in the tray.
10. Hold the tray firmly and insert it in the slot.
Note 
Push it all the way until the handle's lock touches the frame.

Hold the drive carrier firmly with both hands.
Important

Keep the dummy trays for future use.

Keep the dummy trays installed in slots where hard disk drives are not
installed.
Express5800/T110g-E User's Guide
1. Installing Internal Optional Devices
83