Dell PowerEdge R900 - Manual (Page 82)

82 Installing System Components
1 SAS backplane 2 SAS A connector
3 GND/12V connector 4 Controller 0 connector
5 Controller 1 connector 6 SATA_A connector (on system board)
7 SATA_A connector (on Power
Interposer Board)
8 Power Interposer Board (PIB)
9 PIB power connector 10 SAS B connector