Step 7
Remove the three black Phillips screws securing the plastic framework to the logic board and lower case.
Step 8
Grasp the optical drive and mass storage unit in one hand and lift up enough so that you can see beneath it.
Step 9
If your mini has neither an Airport card nor a Bluetooth board, you can simply lift the optical drive up and away. Otherwise, you need to disconnect the Airport and/or Bluetooth antenna cables first.
With your free hand, pull the Bluetooth cable up from Bluetooth board and unplug the Airport antenna cable from the right of the Airport card.