Based on this video beginning at about 4:30, it looks like the cams are at the round parts on the lobes. The double mark on the bottom cam gets rotated counterclockwise from about 2 o'clock to 12 o'clock and the upper gets rotated clockwise from 4 o'clock to 6 o'clock. At least when I do mine, that's where I'm starting and I hope it works.