IBM 5000 - Manual (Page 63)

Working with Adapters
c. Fit the foot of the slot retaining clamp to the top of the expansion slot.
d. Push the curved arm of the slot retaining clamp toward the adapter until the
clamp is locked into place.
e. If necessary, connect any internal cables to the adapter. Refer to the
documentation that comes with the option.
f. If you removed the card-guide retaining clip in step 4a on page 50, reinstall
it now.
7. If you want to install or remove any other options, do so now. Otherwise, go to
“Completing the Installation” on page 76.
Chapter 4. Installing Options 53