IBM System x3750 M4

connector on the other end of the cable to the backplane power connector on
the system board. See the following cabling illustration.
Note: You can connect the cables to the drive backplane before you install the
backplane onto the cage, or you can connect the cables after you install the
backplane, if that is easier for you.
9. Insert the backplane tabs into the slots on the bottom of the backplane cage
and rotate the drive backplane assembly forward until the backplane locks in
place.
126 System x3750 M4 Types 8722 and 8733: Installation and Service Guide