Dell Precision 330 Service Manual page 71

To further ensure proper positioning of the drive in the chassis, insert
and tighten all four screws in the order in which the holes are numbered
(the holes are marked "1" through "4").
Slide the new drive/bracket assembly into the drive bay until both
2
drive bracket tabs snap securely into place (see the following figure).
I n s t a l l i n g t h e D r i v e B r a c k e t ( D e s k t o p C h a s s i s )
Connect the interface cable for the drive. See
3
(Desktop Chassis)."
NOTICE: To avoid possible damage, you must match the colored strip on the
interface cable with pin 1 on both the drive and system board connectors.
drive/bracket assembly
bracket tabs (2)
"Attaching Drive Cables
D i s k D ri ve s a n d M e d i a
71