Dell EMC PowerEdge XE8545 Installation And Service Manual page 82

Figure 84. Removing expansion card from Riser 2
7. If the expansion card is not going to be replaced in Riser 2, install the filler brackets and close the metal retention latch.
Figure 85. Installing the filler bracket for Riser 2
8. If the expansion card is not going to be replaced, install a filler bracket and close the card retention latch.
NOTE: The procedure is similar for Riser 4.
82 Installing and removing system components