Dell PowerEdge R630 Owner's Manual page 116

Figure 49. Removing the expansion card riser 1
1. expansion card riser 1
3. riser guide pin
Figure 50. Removing the expansion card riser 3
1. expansion card release latch
3. connector
2. If applicable, remove or install an expansion card on the riser.
3. Install the expansion card riser.
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2. connector
2. expansion card riser 3