I don't know, but here's what I do: remove the swivel stud, position the butt cuff, poke a small hole in it, directly over the swivel stud hole, then screw the stud back in. You will have to hold down the cuff tightly to keep it from getting torqued as the stud goes home, but it makes a much cleaner installation than cutting a hole big enough to go over the stud, plus the butt cuff won't unravel, and the clamping effect helps hold it in place.
If you do decide to make the bigger hole, cut a slit laterally (perpendicular to the rifle), rather than longitudinally. A longitudinal slit will pull apart due to the tension in the cuff.
