Apple PC Compatibility Card (Installation) - Manual (Page 44)

7 Fold down the cable as shown below, so that the cable lies flat along the top of the card.
You should be able to pinch both folds between your thumb and forefinger so
that the cable lies flat.
IMPORTANT Do not press down too hard on the top of the card. Applying
excessive pressure to the card may damage the card and your logic board.
8 If you removed a PCI card from the bottom PCI slot, reinstall it now in the top PCI slot.
Remove the screw that holds the upper port cover in place, and remove the
port cover. Then insert the PCI card into the top PCI slot. For detailed
instructions, refer to the manual that came with the PCI card.
Fold down the cable so that it lies flat against the card.
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