The connector area is cut away . On the projected view you see the radius on the inner edge, that is needed to avoid additional side operation on CNC mill
Aha, you will use cnc mill on these?, then it should be possible to mill out areas where one would use throughole components, and thus don't worry about finding proper smt connectors?
Or even, mill out so the 16 pads for the chips are raised? (ok, i'm proably blabbering here..)