NEC POWERMATE CT User Manual page 124

Press the bracket cover over the front shield so the two side tabs click
5.
into place (see the figure "3 1/2-inch accessible device bracket" in the
previous section).
Slide the bracket into the lowest accessible bay in the chassis (for the
6.
chassis orientation you plan to use). The tab on the end of each rail
should click into place when the bracket is in place.
Installing the 3 1/2-inch accessible device bracket
Reconnect the power and signal cables for all devices in the
7.
two-device bracket (see "Diskette Drive Cabling").
Replace the front panel (see "Replacing the Front Panel").
8.
Replace the system unit cover (see "Replacing the Cover").
9.
Installing Options 4-43