3Com NETBuilder II Installation Manual page 19

9 Place the bracket containing the floppy disk drive and the flash memory drive in
the chassis.
As you place the floppy disk drive and flash memory drive into the chassis, you
can compress the ribbon and power cables against the backplane.
a
Slip wide part of
keyhole slots over pins
on bottom of chassis.
b
Slide bracket toward
front of chassis so that
bracket locks in place.
Keyhole slots on bottom of floppy disk bracket
Replace retaining screws.
Installing in the Dual-Wide 8-Slot Chassis 1-15