To me it looks as though you have parts missing (barrel nuts for the PM bolts to thread into), and the rotor is too small to allow an adapter anyway because there's insufficient clearance between the posts to get an IS mount wedged between them like this:
Yessss, so I guess i'll just have to put these on..
Or buy a larger rotor and find some mount that'll allow me to make it work. How can you find the correct hope mount? I'm not familiar with the sizing options listed.
To me it looks as though you have parts missing (barrel nuts for the PM bolts to thread into), and the rotor is too small to allow an adapter anyway because there's insufficient clearance between the posts to get an IS mount wedged between them like this: