Dell Dimension 4550 - Manual (Page 103)

Adding Parts 103
4 Check all cable connections and fold cables out of the way to provide
airflow for the fan and cooling vents.
5 Close the computer cover (see page 104).
NOTICE: To connect a network cable, first plug the cable into the network
wall jack and then plug it into the computer.
6 Connect your computer and devices to electrical outlets, and turn
them on.
See the documentation that came with the drive for instructions on
installing any software required for drive operation.
Use the Boot Sequence option in the system setup program to adjust
the boot order of the floppy drive. For more information about the
system setup program, see page 110.
power cable
floppy-drive cable
system board
floppy-drive
connector
cable restraint