Dell OptiPlex Tower 7010 Owner's Manual page 44

About this task
The following image indicates the location of the 2.5-inch hard drive bracket and provides a visual representation of the
installation procedure.
Steps
1. Align and place the second hard drive into the hard drive cage.
2. Replace the two (M3x3.5) screws to secure the second hard drive to the hard drive cage.
3. Align and place the first hard drive into the hard drive cage.
4. Replace the two (M3x3.5) screws to secure the first hard drive to the hard drive cage.
Next steps
1. Install the 2.5-inch hard-disk drive
2. Install the side cover.
3. Follow the procedure in
44 Removing and installing Customer Replaceable Units (CRUs)
assembly.
after working inside your computer.