Slide the door inset into the door panel on the exterior side of the door. Hold it in place against the door panel and mark the mounting holes in the inset onto the edge of the door panel with a pencil. Set the door inset aside.
Drill a pilot hole into the center of each mounting hole marking on the edges of the door panel with a screw gun equipped with a 1/16-inch drill bit. Drill the hole 3/8-inch deep.
Place the door inset back into the door panel. Drive the screws that were included with the door inset through the mounting holes in the door inset into the edges of the door panel with the screw gun.