Check my work
The SMK set is at (x,y in mm):
(-3.15, 5.75) and (3.15, 4.5) from the centroid pictured.
Using a standard Cartesian plane, not that backwards **** KiCAD uses.
The blue square is the 14x14mm cutout.
I don't think the tenkey I made will be able to handle this modification since the USB hub wiring takes up a lot of space. However, it might work for the TKL.