Sun Microsystems Enterprise 250 Owner's Manual page 149

b. Push the card into the corresponding connector on the main logic board.
Figure 6–12
To install a PCI long card:
i. Insert the faceplate end of the card into the appropriate slot opening in
the rear panel, while at the same time aligning the opposite end of the
card with the long card slot guide.
ii. Push the card into the corresponding connector on the main logic board.
Removing and Installing Main Logic Board Components
115