Does anyone know if you can fit the DYNA solo rack to the sporty ?

The mounts look like they may in the pics but I havent seen a real one before. 

I want to do this because the sporty solo rack is a detachable and the dyna is a fixed unit.

If I fit the Dyna fixed one, then I can use the Dyna detachable bitch pad with sissy bar if the Mrs ever wants to tag along.