Storage Hole in Aft Cabin

We cut this hole to access space for very long items and store mops, brushes, extra lumber, poles and anything long enough not to get stuck too far back. The center is located 6" up from the bottom and 51/2" from the side wall but it should have been at least 1" closer to the center and away from the wall due to the corner curvature and fitting the hatch plate to a flat survace. We had to trim the plate edge a small amount...others can learn from our mistake!!!