The wall on the right. The last time, I saw it, I set up, I took a while to adjust all the tripod legs until head is straight straight (that time still dunno how to straighten head the easy way), adjust camera settings... the lights went out and I did a face palm.
I see those light fixtures on the side-wall, ought to be pretty when lit! Judging from this angle, should have a good idea where to look for you, if I'm able to reach there early