Dell OptiPlex 3000 Small Form Factor Service Manual page 30

Steps
1. Connect the power and SATA cables to the optical drive while holding the disk-drive cage upside down.
2. Hold the disk-drive cage upright and align the mounting points with the ones on the chassis.
3. Push the disk-drive cage until the assembly is secured onto the chassis.
4. Move the lock handle from the locking mechanism towards the right
5. Install the single (6-32) screw to the locking mechanism to lock the disk-drive cage in place.
6. Route the optical drive's power and data cables through the routing guide on the disk-drive cage.
7. Route the hard-drive power and SATA cables through the routing guide on the lock.
Next steps
1. Install the 3.5-inch hard-drive.
2. Install the 2.5-inch hard-drive.
3. Install the front bezel.
4. Install the side cover.
5. Follow the procedure in
30 Removing and installing components
after working inside your computer.