Dell Vostro 260 (Mid 2011) - Manual (Page 30)

6. Lift the power-supply unit and remove it from the computer.
Installing The Power Supply
1. Place the power-supply unit at it's location in the computer.
2. Slide the power-supply unit towards the back of the computer till it snaps
into place.
3. Replace the screws that secure the power-supply unit to the computer.
4. Connect the power supply cables to the hard drives, optical drives, and
system board.
5. Replace the cover .
6. Follow the procedures in After Working Inside Your Computer .
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