I believe that case has a top vent/fan location. So you could orient the cooler to exhaust upward out the top. Same end result as exhausting out the back, maybe better because of thermal dynamics.
I've never seen those adapters before, but if that is what they are for, I would have expected them to be included with the cooler. If not, then they appear to be what is needed for changing the orientation to exhaust out the back.