Not having worked on the specific car, but generally
There is usually a Phillips head screw that holds the drum to the rear hub. The wheel studs poke through the drum.
Remove the wheel first of course, remove the screw and then you slide the drum off. Often it's stuck, and a few taps with a hammer loosen it. There is a chance that the pads are in a groove if the drum is worn badly - that could cause a problem taking off the drum.