Jeff I have one on my General. The little hole you can see in your picture is supposed to be flush with the body of the rest. We're talking about 1/16 of an inch... if that. Don't think it really matters that much but if you watch the installlation video it references the timing hole and the bottom of the hole being flush with the frame of the rest a few times.
http://www.watchtheoutdoors.com/showcase/hunting/spot_hogg.html