635Secure it with the four screws you removed earlier.Note:Make sure that the other ends of the disk cables aresecurely connected to their corresponding connectors on themainboard.6Replace the side panel (see page 50).Installing an expansion cardTo 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. Savethe screw.