That's another issue when it comes to building from "specs"...... and is the difference between knowledge and experience........ Place the pin(s) where it/they "look" correct....... and the positioning will never be questioned.
I'm reminded of/recall several folks who have failed either their JS and MS presentation tests because pins/fasteners did not "look" correct, but had been "centered" in the exact same manner.....off a CAD drawing/line. One guy who failed because of this exact thing, threw such a hissy fit, swearing at the judges (me), that he was told to collect his knives, and never come back.