iFixit

Edit Step 17  ¶ 

• Place custom fit adhesive strips or double stick tape on the open areas of the touch screen plastics. Lift the custom adhesives straight off the backing paper and apply.
• Once attached, remove the outside covering to expose the second adhesive layer. This layer is very thin and may take some patience to remove. Similarly, if you used double stick tape, make sure to peel off its outside layer before attaching the glass.
• When reattaching the plastics to the glass, make sure the "#2" cable is routed as shown in the second picture.
• Reattach the plastic frame to the glass. Pinch each corner for 60 seconds to allow the tape time to bond the two surfaces.