Mitsubishi Electric Apricot XEN pentium Owner's Handbook Manual page 94

Expanding the system
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12. Line up the holes in the underside of the drive with
those in the base of the drive bay.
13. Insert the four drive securing screws, and tighten them
until they are finger tight.
14. Gently tighten the four screws.
SECURING
SCREW
HOLES
A C T
C O M P
SECURING SCREWS
A C T
C O M P