I got it. There is a rubber plug on drum part of rotor pop that out and put on bottom , look for the adjuster (star) adjust to loosen (bottom to top) then thread 2 bolts in threaded holes and tighten evenly till it's off. Need about 2 in. bolts I don't know thread size I just pulled 2 out of bolt box and they fit.
Also found that so much rust built up under stainless slides that brakes were locked tight. Needed to use hammer to get pads out of slides (anti rattle clips) so I removed clips and filed rust away then applied neversieze shouldn't happen again