In the graphics window, select a solid plane that is parallel to the XY plane. This plane is the start plane of the core pin. Then select two straight edges as the locating references. The two edges must be perpendicular to each other, and they must not be perpendicular to the selected plane.
In the graphics window, select a circle, arc edge, or cylinder face in which to locate the core pin. The axis direction of the selected object must be parallel to the Z axis.