Thats correct, the other is the guard off to the left comming out of the keep. In this one, you are goblins and have to kill gaurds. You have to loot 5 keys to free goblin prisoners. This one is also bugged quite a bit. It offers the same exp, but takes much longer to complete. Kill 20 guards, loot 5 keys, free prisoners. I have been through 5 total and the last 2 we never finished after killing in upwards of 30 guards and only looting 1 key. Needless to say, I haven't done that one since.
Just a side note here, they do plan on Nerfing the MM's exp to be more in line with the time it takes to complete. So, HHK will probably not be as popular as it currently is after the patch on the 20th of Feb.