I have a few nail pops I would like to fix and want to be sure I am putting the screws in the right place. The nail pops are along the edge of the ceiling where it meets the angled portion of a ceiling that connects to a dormer (see pictuere). The pops are about 15-16" apart. Do the screws go on either side of the nail head (1 - 2 inches away) along the line where the two drywall pieces meet, or perpendicular to that? Basically, do the screws go along the red line in the picture, or along the black line?