I think now it is clear that the first clue is located outside ferry terminal, and direct teams to the macau tower with hours of operation to bunch up the teams.
Therefore I am pretty sure that the scene where we see Dustin saying trying to bribe others is outside the macau tower, they are waiting for it to open.
And for the yield mat, from the background I think it is placed at the floor where they do the skywalk, you can see wooden floor outside and I bet this is right outside the lift. Therefore the mat is not at ground floor and it is crucial for teams to take the first lift to the top of the tower to avoid being yielded.
However, what I don't understand is why E/D seem waiting outside the ferry terminal? What are they waiting for? Could this clip come from the later part where they have to go back to HK and take plane to Guam?