Been meaning to post these for a while. In the non-guild runs I've joined there's usually been an embarrassing pause while the leader of the pugged raid asks for volunteers to go through the last portal for the end part, to do the various tasks. Likely if you haven't done the puzzle before you won't volunteer because ... well, it's a raid and the pressure is on. But do not fear volunteering to do the puzzle. As you can see in the screen shots, it's straightforward and actually quite hard to mess up if you keep heading in the right direction.
I think it's easier to start from the right and work around to the left - and have numbered the jars accordingly.
(of course while you're doing the puzzle, there's a bit of chaos happening around you ... try to stay focused!)