Western Digital My Book Duo User Manual page 81

12. Gently slide the replacement drive assembly into the enclosure until it is fully
inserted:
13. Engage the alignment tab on the back of the drive hold-down plate with the
alignment slot on the enclosure chassis, lower the cover into place and secure it with
the thumbscrew:
Note: Do not overtighten the thumbscrew.
MY BOOK DUO
USER MANUAL
REPLACING A DRIVE – 76