Right after you destroy the horns blocking the final zones (forget the zone name, at work, I'm lazy). After you cross the bridge you're hit with a dead end on one side, and the correct path on the other. The mini-map has 3 grey squares(I think they're lamp posts). Go the opposite direction of those grey dots for the proper path. I haven't tested this enough to make sure it's 100% correct, but so far after 20+ runs, it's been the correct direction.

Course, this only saves you <3 seconds but speed runners want those 3 seconds I guess. :)