Dell Precision 5860 Tower Service Manual page 96

Steps
1. Slide the power-supply unit into the chassis until the securing tab snaps into position.
2. Replace the four (#6x32) screws to secure the power-supply unit to the chassis.
3. Route the PCIe power-cables and SATA power-cables through the bottom-air shroud.
4. Close the bottom-air shroud cover.
5. Connect the PCIe power-cables to the slots on the PCIe holder.
6. Connect the SATA power-cables to the connectors on the system board.
7. Align and place the power-supply cover over the power-supply unit.
8. Install the two (#6-32) screws to secure the power-supply cover to the chassis.
9. Open the clips on the routing guides on the power-supply cover and route the CPU ATX power-cables through the clips.
10. Close the clips on the routing guides on the power-supply cover.
11. Connect the ATX CPU power-cables to the connectors on the system board..
Next steps
1. Install the air shroud.
2. Install the side cover.
3. Follow the procedure in
96 Removing and installing components
After working inside your computer.