Now that the back housing is removed we can locate the flex cable connections on the logic board.

There are five flex cable connections on the exposed side of the logic board. These are highlighted in orange. There is also one connection on the usb charge board which is highlighted in red. This flex connection is for the home button, and the two capacitive buttons (back button and menu button).

Make sure to remove the small bracket that is in place over the area of the front facing camera.