There are two flathead screws that hold the drum to the hub. Take a wire brush or wheel and clean the areas between the lugs and you will find them. You will need a very wide screw drives to get them out. I had to use a punch to tap them loose.
As far as the bolts go, I used a propane torch to heat the frozen nuts to break them loose. I also wire brush the exposed threads, clean them up as much as possible and apply PB Blaster before trying to remove the frozen nut..
