The back pad is held in with glue so use caution when removing to prevent tearing. Low heat may be used to help remove the pad.
Slowly peel off the rubber pad on the bottom of the device. Start from one corner and peel with your fingers. Use heat if necessary until pad is completely removed.
This is where you would use the opening tool. It's the perfect tool to lift the rubber base around the metal lip and then pull with your fingers.
After removing the rubber pad, unscrew the five 5mm phillips #00 screws in the holes of the back cover.
Lift up the back case from the perforated edge to remove it.
Remove logic board and metal casing from outer case by prying from one side using a spudger.
I have found it easier to lift from the side with the Ethernet ports. When putting back together watch that the three WI-FI antennas don't get snagged against the case as your putting back.
Unhook the wires connecting the logic board to the metal casing by grabbing and pulling up on each connection with tweezers.
Carefully push back the three metal tabs with your fingers on the sides of metal case.
Carefully pull the metal case away from the logic board.
Locate the WiFi card on the logic board, then use the prying tool to bend back the plastic holding it in place.
Be careful when prying back the plastic piece, it can break if bent too far.
After holding back the plastic piece keeping the card in place, lift the card up and pull it away from the logic board.