There will be a round canister looking piece on the frame. Go to where the doors meet on the side and look at the frame and see if you see it. It will have lines running to the front and back shocks.
To replace: XREAS is a cross linked system, so if you want to replace one, you MUST replace the one opposite of it. For example, if you want to replace the front passenger side, you must replace the rear drivers side. You can only do this once. A third time requires an entire system replace.
To remove: If you want rid yourself of it, rip out the lines as well as the canisters (look on picture):