NEC PowerMate Enterprise Manual page 159

Installing a 5 1/4-Inch Device
Install a 5 1/4-inch accessible device into the device cage as follows.
Remove the front panel as previously described.
1.
Follow the preinstallation instructions that come with the device. Instructions
2.
might describe setting jumpers and switches.
Locate the NECCSD device rails that ship with the system or the NEC rails
3.
included with an NECCSD option. Attach the rails to the sides of the device with
the four screws that come with the device (see Figure 3-30).
NOTE: To install a 3 1/2-inch hard disk drive in
the 5 1/4-inch slot, a 5 1/4-inch frame adapter is
required.
NOTE: Use only the NEC drive rails shipped
with the system or the rails shipped with NEC
option upgrade kits. For non-NEC options, if
rails come with the option or are installed on the
device, do not use them. See the documentation
that comes with the device.
Figure 3-30 Attaching the Device Rails
Option Installation 3-35