Sentinel: Descendants in Time Hints

I know the answer, but I can't find the puzzle grid for this one?

  • 1 of 3: The video clue showed a golden puzzle grid opening on a dull wooden wall.
  • 2 of 3: There is one puzzle grid in a similar setting that you may have seen shortly after you arrived in Argannas.
  • 3 of 3: From your starting point (next to the transporter), head up the ramp, and then to the building on the right.  Walk into the doorway, and the puzzle grid is in the next room.