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6Connect all internal cables to the mainboard.
To make sure you route the cables correctly, refer to “Front panel board” on page 89. If the cables are not routed correctly, you won't be able to close the front subchassis.
7Install the PCI
a At the back of the electronics bay, slide the end of a curtain with the locking tab into the topmost square hole adjacent to any
b At the front of the electronics bay, slide the tab at the other end of the curtain into the clip on the corresponding retention mechanism.
8Install all PCI
9Attach the external cables to the mainboard I/O ports.