Swivelling this mirror back into place should restore some light to the halls of Khazad-dum. Once you have finished, you should seek out someone at the East Gate of Moria in Nud-melek.
The dwarf-mirrors of Khazad-dum once illuminated the underground halls, but many have since fallen into disrepair or have been knocked out of alignment.
Dwarves hold the East Gate of Moria in Nud-melek.
You should tell a guard of your continuing efforts towards lighting Khazad-dum once more.
This quest counts as "Complete 'Reflections of Riders"" for the Deed: