HP Compaq d330 DT Hardware Reference Manual page 37

Hardware Upgrades
7. Insert the hard drive into the bay from the front of the chassis.
Push it in until it locks into place.
Inserting a Hard Drive into the Drive Bay
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CAUTION: Make sure the guide screws line up with the guide slots in the
drive cage. The use of unnecessary force when installing any drive into the
drive bay may result in damage to the drive.
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