The position is drawn relative to a coordinate sytstem representing the testing grid (horizontal: columns, vertical downwards: rows). The center point is the testing point, all dimension are relative to this point (red dot)
Test point coordinates for 2 units: midpoint between units centers
Tilt Angle:
1 unit: rotation of unit around center point
2 units: rotation of axis between center of units around midpoint (red line)
Master/Slave Tilt Angle: rotation of Master/Slave Unit around center of unit (red circle) relative to axis between center of units (red line)