Dell PowerFlex R750 Owner's Manual page 24

Figure 23. 16 x 2.5-inch NVMe with fPERC
Table 13. 16 x 2.5-inch NVMe with fPERC
From
SIG_PWR_1 (system board power connector)
CTRL_SRC_PA1 (fPERC controller connector)
CTRL_SRC_PB1 (fPERC controller connector)
SL1_CPU2_PB1 (signal connector on system board)
SIG_PWR_2 (system board power connector)
CTRL_SRC_PA1 (fPERC controller connector)
CTRL_SRC_PB1 (fPERC controller connector)
SL3_CPU1_PB2 (signal connector on system board)
24 Component installation guidelines
To
BP_PWR_1 (backplane power connector)
BP_DST_PA1 (backplane signal connector) and BP_DST_PB1
(backplane signal connector)
BP_DST_PA2 (backplane signal connector) and BP_DST_PB2
(backplane signal connector)
CTRL_DST_PA1 (fPERC input connector)
BP_PWR_1 (backplane power connector)
BP_DST_PA1 (backplane signal connector) and BP_DST_PB1
(backplane signal connector)
BP_DST_PA2 (backplane signal connector) and BP_DST_PB2
(backplane signal connector)
CTRL_DST_PA1 (fPERC input connector)