Use an iPod opening tool to slightly lift the top edge of the connector cover away from the logic board.

Use the tip of a spudger to pull the connector cover retaining clips away from the inner frame.

Remove the connector cover from the iPhone.

Before reassembly, be sure to clean all metal-to-metal contact points on the connector cover with a de-greaser such as windex. The oils on your fingers have the potential to cause wireless interference issues.

There is a tiny metal part on the top screw hole, make sure this stays on. It's a key part of the wireless and GPS antenna.