Dell Vostro 360 (Late 2011) - Manual (Page 42)

9. Remove the middle frame from the computer.
Installing The Middle Frame
1. Place the middle frame on the chassis.
2. Secure the clips until all of them snap on to the chassis.
3. Tighten the screws to secure the middle frame.
4. Install the optical drive .
5. Install the front feet .
6. Install the rear I/O cover .
7. Install the rear stand .
8. Install the rear cover .
9. Follow the procedures in After Working Inside Your Computer .
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