Dell EMC PowerEdge R730xd Owner's Manual page 128

Figure 61. Identifying connectors on the expansion card riser 1
a. expansion card slot 1
b. expansion card slot 2
c. expansion card slot 3
Figure 62. Removing the expansion card riser 2
1. power connector (for GPU cards)
3. riser guide-back
5. riser guide-front
128 Installing and removing system components
2. expansion card riser 2
4. expansion card riser 2 connector