Dell POWEREDGE R710 - Manual (Page 114)

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Installing System Components
6 If not already done, route the interface and RAID battery cables in the
cable path inside the right interior wall of the chassis beneath the cable
retention bracket. See "Cable Routing" and Figure 3-21 through
Figure 3-23.
7 Connect the SAS A cable to the SAS A connector on the backplane and, if
applicable, connect the SAS B cable to the SAS B connector on the
backplane.
8 Close the system. See "Closing the System."
9 Reconnect your system and peripherals to their electrical outlets, and turn
on the system.
Figure 3-21. Storage Controller Card Cabling (2.5-in Hard-Drive Chassis)
1 RAID battery (PERC only) 2 SAS B connector on backplane
3 SAS A connector on backplane 4 cable retention bracket
5 integrated storage controller card 6 SAS_0 connector
7 SAS_1 connector 8 RAID battery connector (PERC only)
2 7 4 3 5 1 6 8