http://clip2net.com/s/isDHnS

so, seems here is a puzzle?
4 plates below near some sort of hatch, 4 plates above with sentinels
plates below click's with barrels, but plates on high click's only with char on it.
so, i have only 2 chars both with lone wolf, so no companion's for this puzzle.
and even if i kill sentinels so there is no one to shout out about me - when i click top plates in 1-2-3-4 order - nothing happens..

seems like i have to have 4 char's to solve this?