Coordinates of Trackable object detected on mobile screen

Hi, 

I am trying to obtain the Coordinates (position of the object on the mobile screen) of the object detected by the vuforia so that I can reuse those coordinates to draw some 2d image or object at that position/Coordinates.

Please help if you have any idea how can we extract the location where the vuforia augments the 3D object after Successfully tracking the object.

Thanks