Google Maps! This is the map with all the locations and pointage values. There was 17 total points all of which were valued in accordance to proximity to the start and finish locations as well as ease in finding them.
There were green stickers located on either the western or southern end of each bridge under the stairs. Each with a corresponding number code to be verified. If you watch the video I believe at 2:17 you’ll see a little green dot on the lip of the bridge’s underside.
There was a time limit so a route had to be chosen carefully. I think ultimately this left people in a rush and the stickers often went overlooked. I saw three on the way from the start to finish, all city center. I wouldn’t be surprised if some had been removed in the hours preceding the race. Oh well. Good ride for most regardless.