Dell EMC PowerEdge XR11 Installation And Service Manual page 78

Figure 72. Removing filler bracket from Riser 2 and 3
Figure 73. Installing single width GPU in Riser 2 and 3
NOTE: The blue retention latch is only used when a half-length card is installed. If a shorter card is installed the blue
retention latch is not applicable.
78 Installing and removing system components