HP 98568A Installation Instruction page 32

HP 98568A Backplane Expander
13. Press the sliding clips onto the edges of the opening. Press the clips until
they "snap" into place.
Note
Figure 2-6.
Pressing the Clips into Place
If the sliding clips are difficult to install, make sure that the
top is properly aligned. If so, work on one end of the clips at a
time.
14. Turn the expander and attached cover over and place it on top of the
computer with the cables passing up through the slot in the bottom of the
expander.
2-8 Adding Expanders