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d. Insert the hard disk tray back at 45 degrees with the opening of its locking buckle facing
downwards, hold the screw in the red-framed part to lower the hard disk tray until it is level,
and fasten the black screws on the left and right sides and the white screw on the top.
e. Connect data and power cables to hard disks. Connect hard disk cable ports P0–P3 to
hard disks on the lower-layer hard disk tray and ports P4–P7 to hard disks on the upper-
layer, as shown in the lower left figure.
f. Close the chassis cover, and use a PH2 screwdriver to fasten the rear screws.