Dell PowerEdge R740xd Installation And Service Manual page 162

5 power connector (J_PWR_A)
7 PCIe connector (BP PCIE A2)
9 PCIe connector (BP PCIE A1)
11 PCIe connector (BP PCIE A0)
Figure 116. Back view of 24 x 2.5 inch (24 NVMe) backplane
1 expander board connector B1 (PE1_B)
3 expander board connector B2 (PE2_B)
5 signal connector (J_SIG_A1)
7 power connector (J_BP_PWR_A1)
9 power connector (J_BP_PWR_A2)
Figure 117. Back view of 12 x 3.5 inch backplane
1 power connector (J_BP_PWR)
3 SAS connector (A1 BP SAS)
5 SAS connector (J_SAS_A0_B0)
162 Installing and removing system components
6 power connector (J_PWR_B)
8 PCIe connector (BP PCIE B2)
10 PCIe connector (BP PCIE B1)
12 PCIe connector (BP PCIE B0)
2 expander board connector A1 (PE1_A)
4 expander board connector A2 (PE2_A)
6 SAS connector (J_BP_SAS)
8 signal connector (J_SIG_A2)
2 SAS connector (A2 BP SAS)
4 signal connector (BP SIG1)