Dell POWEREDGE M915 - Manual (Page 222)

222 Installing Blade Components
6 Lower the card into place until it is fully seated and the plastic clip on the
outer edge of the card fits over the side of the blade chassis.
7 Close the retention latch to secure the mezzanine card.
8 Close the blade. See "Closing the Blade" on page 161.
9 Install the blade. See "Installing a Blade" on page 158.
Removing a Mezzanine Card
1 Remove the blade. See "Removing a Blade" on page 155.
2 Open the blade. See "Opening the Blade" on page 159.
3 Open the mezzanine card latch by pressing the ridged area on the latch
with your thumb, and lifting the end of the latch. See Figure 3-25.
NOTE: Hold the mezzanine card by its edges only.
4 Lift up the mezzanine card straight up from the system board.
5 Close the retention latch.
6 Close the blade. See "Closing the Blade" on page 161.
7 Install the blade. See "Installing a Blade" on page 158.