In Jackson's cellar the button is in the southeast corner, on the wall or post, not the floor.
In the Forgotten Outpost just west of the farm, the pressure plate is on the wall at the end of the path (if you could get through the broken door and turn right, you'd be facing the movable wall).
This is Jackson's Dungeon I am speaking about
All Right, I am listening to you but I do not understand.
Will you please clarify?
I don't know how to ascertain direction in this dungeon
I have been unable to locate the pressure point in the Dungeon