Reference; Hdd Cage Cable Connection - Intel P4000RP Quick Installation User's Manual

Reference

NOTE: Refer to the documents which come with your server board and/or RAID controller card for instructions on connecting backplane cables to your server board or
RAID controller card.
A
Connect the I 2 C cable to I
B
Connect Mini SAS data cables.
C
Connect two power cables.

HDD Cage Cable Connection

8 x 3.5" HDD Cage
C
B
A
2 C connector on backplane.
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