The next part needed to remove covers each side and the power and bluetooth buttons in a middle strip along the speaker.

The first picture is for reference. That is the part that will be removed.

Begin (as shown in the second picture) by unscrewing the two screws (17mm each) with the Philips #00 screwdriver.

Then flip the device around and unscrew the other two screws (17 mm each) on the other side just the same.

In these pictures the speaker is still in the device. It is best to have already removed it in the Speaker Replacement Guide.