Get your iOpener/Heatgun and start by heating up the upper back cover.

Start heating around the edges and place your suction cup. Be careful of the display when heating. When heated enough, you should be able to insert a pick between the frame and the back glass.

Go around the frame and cut through all the glue to remove the back cover. Be careful not to cut too deep into the glue to avoid damaging the display.

Finally, remove the plastic clip that holds the secondary display connector in place and unplug the cable with a pair of pliers.