We are starting on the left side of the device. This is where the D-pad is, or in other words the left, right, up. and down directional pad.

The next step is to take the ribbon off of the green casing on the left.

Then simply unscrew the two screws holding down the green casing using a J00 bit from the iFixit pro toolkit, they should both be 6.35 mm .

Now simply raise the last restraint, a metal bar that is holding the casing down. Once it has been removed you can take off the green casing.