I just bought a 1995 626. It was cheap for a reason, but mainly because it needs the brakes and a wheel bearing replaced, and the parts came with the car. I have read practically every post/seen every video about stuck brake drums, and have tried pretty much all of the things suggested. At this point I'm pretty sure I just need to back off the shoes (and then reapply another method), but I have looked, poked, and prodded everywhere in that brake assembly and I cannot find the adjuster.
There was a hole with a rubber plug in the back, so obviously I started there. I'm pretty confused though, as on one side there are 2 holes while the other side only has one. One both sides a hole led to a thin piece of metal that I can flex, but absolutely nothing else that I can see or touch with a screwdriver other than flat metal.
Am I missing something? I have spent hours messing with the drums on both sides and they haven't budged at all. Please let me know of any suggestions you have.

 

It's no wonder he included the parts! He couldn't remove it himself. He probably told you it needed new brakes and he didn't have time to bother with it. Unfortunately, when it comes to brakes, I am lazy and don't have proper equipment so I can't offer any valid advice. That guy played you. You should phone some places that specialize in brakes and ask them what they would do or just take it there, get a guaranteed quote first for labor and turn the tide on them! Make sure you install all new hardware, not just pads and drums.
GOOD LUCK.

 

I did the drums on my '98 Protege and I think that yours would be almost the same. The shoes are self adjusting, you cannot find the adjuster until the drum is off. If the drums are worn they have formed a lip and that is the reason you cannot pull the drum off. I used a sledge hammer and a chisel this way: I placed the shaft of the chisel in the groove on the drum so I could hammer on the chisel without hitting the backing plate. Keep turning the drum and keep banging away on it by the way of the chisel or similar object.
I suggest you disconnect the e-brake cable first and push or pry the e-brake lever at the drum all the way back before you apply the hammer. In my case the internal e-brake lever was stuck. I still got the drum off without damaging the backing plate.
I wouldn't worry too much about damaging the backing plate as I could get a good used one from the junk yard easily.