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5 Secure it with the four screws you removed earlier.
Note: Make sure that the other ends of the disk cables are securely connected to their corresponding connectors on the mainboard.
6 Replace the side panel (see page 50).
Installing an expansion card
To install an expansion card:
1Remove the side panel (see page 49).
2Locate an empty PCI slot on the mainboard.
3Remove the screw that holds the bracket to the computer. Save the screw.