How do you get to mournhold in elder scrolls morowind GOTY

assuming that it's the same as the not GOTY edition, once you've been attacked by the dark brotherhood (this happens randomly once you rest). Then, talk to any guard, they will tell yo to go to Ebonheart. Go there and find Apelles Matius. He'll tell you that Asciene Raine can transport you to Mournhold.