9. Remove the SAS controller front retention bracket from the server.
10. Connect one end of the internal power cable that comes with the 8 Pac HDD
option kit into the empty hot-swap SAS/SATA power connector on the system
board.
11. Remove hard disk drive backplane 1 from the server.
70 System x3650 M3 Types 4255, 7945, and 7949: Installation and User’s Guide