While I can't tell you exactly where all five are located, I can say that all 5 can be found between the doorway you unlocked to get into that area and the door that is locked by the smoke stacks.
Look at your map, the path splits into 2 directions, then meets back together. You'll need to look down both pathways to find them all.
1 is at a dead end, another is just off the rooftops on an adjacent building. The other 3 are on the regular rooftops.
