Dell XC720xd Owner's Manual page 63

5. expansion-card riser 1 connector
Figure 29. Identifying connectors on the expansion card riser 1
1. expansion-card slot 1
3. expansion-card slot 3
Figure 30. Removing and installing the expansion card riser 2
1. power connector (for GPU cards)
3. riser guide-back
5. riser guide-front
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6. riser guide-front
2. expansion-card slot 2
2. expansion-card riser 2
4. expansion-card riser 2 connector
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