thats how i do it, well actually i pull through my cool tube and then push through my carbon filter due to design constraints. But yep that looks good. I've always read and been told that fans have an easier time pulling air through obstructions such as filters and ducting rather than pushing through them.
and it doesn't really matter what way you set it up as long as the air goes through the carbon scrubber before it leaves the room.
I think most say that carbon scrubbers are more efficient if you push through them, kinda an oxymoron with the fans having an easier time pulling and the filter needing to be pushed through don't ya think?