Remove backing from adhesive tape of the side edge of the Corner Cap (F), but do not remove the backing from the adhesive tape on the front edge yet.
Slide the side edge of the Corner Cap (F) while keeping the front attached to align it properly to match the bottom marking with corner cap bottom edge. And, press firmly for a few seconds to secure it in place.
Now detached the front edge of Corner Cap (F) using Measuring Tool (B).
Remove backing from the adhesive tape. (1) Keep pressure on the side edge, and (2) Stick the front edge and apply pressure for a few seconds to ensure it is properly secure.
Apply the self-threading screw if the Corner Cap (F) is not adhering well to the door frame material, or if there is not enough area for the adhesive pads to stick firmly on the frame.