* Locate the four corners of the box by measuring from the nearest fixed edge—a corner, the ceiling, or the edge of an installed panel—to the outside edges of the box.
* Locate the four corners of the box by measuring from the nearest fixed edge—a corner, the ceiling, or the edge of an installed panel—to the outside edges of the box.
* Drill a pilot hole in one corner of the outline, then make the cut out with a keyhole saw.
