No I don't think it's a galley, coz MAS have Economy seats all the way at the back cabin. You can find the galley at the fourth door for MAS' Economy Class. MAS' B744 galley is normally aligned along the 4 center seats, and not by the side. However, after door no. 2, there is a disabled restrooms though, thus explaining for the lack of window there.
Is there any other airlines that do not have windows at the back cabin?
MAS still have to combis, but they are in storage. They do not use them anywhere for their scheduled flight now, but I am not too sure for charter. Maybe they could convert them into freighters now, and can probably stop leasing the aircraft from Atlas Air? MAS' last Combi service was in March 2002.
Hkgspotter1: Thanx for the info. I had not seen any photos of the 9M-MPQ here. Do you know if 9M-MPO have any city names on it? As far as I know, MAS' B744 from 9M-MPK to 9M-MPN does not have any names on it.