NEC MC2400 - Manual (Page 114)

4-32 Upgrading Your System
5. Remove the filler panel from the system bezel corresponding to the bay
where you are installing a media device as shown below. The filler panel is
released by pressing the plastic snap tabs located on the back of the system
bezel. Save the panel for reinstallation.
Removing a Filler Panel
6. Remove the device from its protective wrapper and place it on an antistatic
surface. Record the drive model and serial number in the equipment log.
7. Set any drive jumpers or switches before you install the drive. See the
documentation that comes with the device for jumper or switch information.
Note:
If the drive comes with drive rails, do not use
them. Remove any rails already attached.
8. Attach the device side rails supplied with the system as shown below.