well there is a oval rubber plug near the bottom of the backing plate. pull it out.
you will need two screw drivers, flat. one (regular size 1/4 inch or so. and I like to use a smaller one about 1/8th inch.

reach in with the 1/4 inch one, you are feeling for a star wheel. prying up or down, (memory fails me) you will hear it click as it turns. that is the wrong way. keeping the 1/4 inch screw driver on it. feel around close to it. you are trying to reach under the bolt that the star wheel is mounted on. you will feel a plate that will give when you push on it. hold it there and go the OTHER way they you went the first time.with the wheel using your 1/4 inch screw driver. turn it a bunch of times. you are only turning it about one quarter turn with each movement.

now try to pull the drum off. This is assumeing that you have it loose and it is hanging up on the brake shoes.

if it is still hung up repeat the above.

if you have not broke it loose yet.
do the wheel thing, then go after the bolts like 4 crawler said.
if I remember right these are the same bolts that are under the edge of the hood and hold the fender on. use two of them and don't strip them or the holes out. just snug down and (firmly) tap around the out side of the drum. check the snuggness on the bolts again and tap some more.

once the center breakes loose then it is just the shoes catching on the worn lip of the drum... back under and more wheel work. if the drums are getting tighter you went the wrong way.

I hope that is what you were asking and I have given you an answer that reads, as what I am trying to explain.