As noted on the photo, the top stud is the left outboard of the four in line studs. The next lower stud is 6 9/16" away (center to center) and on a line with the corresponding stud on the right side that is 7/8” forward of the 4 in line studs.
There are now five more on each side to locate.
The next one I’ll locate is the one closest to the rear of the door. This stud is 40 1/8" from the front snap mentioned before. It is 1" behind the door edge.
