Dell EMC PowerEdge R750 Installation And Service Manual page 42

Figure 36. 16 x 2.5-inch SAS/SATA with fPERC
Table 26. 16 x 2.5-inch SAS/SATA with fPERC
From
SIG_PWR_1 (system board power connector)
CTRL_SRC_SB1 (fPERC controller connector)
SL3_CPU1_PB2 (signal connector on system board)
Figure 37. 16 x 2.5-inch SAS/SATA with fPERC and Riser 1C
42 Installing and removing system components
To
BP_PWR_1 (backplane power connector)
BP_DST_SB1 (backplane signal connector)
CTRL_DST_PA1 (fPERC input connector)