Lenovo ThinkCentre 7515 Maintenance Manual page 100

4. Install the adapter card into the appropriate slot on the system board, see
94
Hardware Maintenance Manual
"Locating parts on the system board" on page 89. If you are replacing an
adapter card, remove the old adapter card that is currently installed before
installing the new one.
Notes:
a. The adapter card fits tightly into the card slot. If necessary, alternate moving
each side of the adapter card a small amount until it is removed from the
adapter card slot.
b. If the adapter card is held in place by a retaining latch, press the adapter
card retaining latch 1 downwards to disengage the latch. Grasp the
adapter card and then gently pull the adapter card out of the slot.