The levers are on the only legit circle stone brick in survival mode as of yet. Making these blocks the most valuable things found in this particular dungeon. (Which means most people will probably just disassemble the wall rather than botheriing to solve the lever sequence.)
To get the door open without resorting to breaking down the wall the sequence goes as follows.
Flip lever 3 (furthest right)
Flip lever 1 (furthest left)
Flip lever 1 (back to original position)
Flip lever 3 (back to original position)
Go up the stairs to the main floor, there should be a one block hole in the floor open near the top of the stairs. Chest is inside. (and 3 sticky pistons)
There are 2 chests in this jungle ruins, the second is down the hallway to the right at the bottom of the stairs. This one is guarded by two tripwires with arrow dispensers attached.
The 2 chests contained (in this particular seed)
- 24 bones
- 3 rotten flesh
- 3 emeralds
- 5 iron bars
The 3 circle stone brick, the large amount of mossy cobble and the sticky pistons are probably the better loot then what is in the chests ...