hey! just logged on and I guess it may be too late for you.
i know how it is to try and not be able to do something like this.
I think the "raised circle" you describe is the end of the axle and it looks like it has those 3 "holes" in it, all in a straight line. The center "hole" is smaller than the other 2, right?
They don't have any bolts.
I hope it's just that the brake shoes are tight against the brake drum!!!
If so, go to a friend, or a NAPA or other auto store and get or rent a brake adjustment tool.
make sure the wheels are chocked!!!
take the parking brake off...
on the back of the brake drum backing plate (looking at the drum/plate from the differential outwards), there is a rubber plug @ the bottom of the plate.
Pry it off with a screwdriver.
Then using a narrow blade screwdriver, push the adjusting LEVER away from the Star wheel so you can use a brake tool (looks like a bent screwdriver) to retract the brake shoes from the drum... the tool should PUSH on the star wheel at the top of the wheel to retract the brake shoes..
I was just trying to find a pic for you on the internet so you can see what this looks like. Maybe someone else here has a www site with pics.