Dell PowerFlex R750 Owner's Manual page 41

Figure 44. 8 x 2.5-inch SAS with front PERC module
Table 34. 8 x 2.5-inch SAS with front PERC module
From
SIG_PWR_1 (system board power connector)
CTRL_DST_PA1 (fPERC connector)
Figure 45. 8 x 2.5-inch all NVME with front PERC module
To
BP_PWR (backplane power connector)
SL3_CPU1_PB2 (Signal connector on system board)
Component installation guidelines 41