you can mount a fan on either side of the rad its just the lcb offer one i got that was advertised as a push or pull will blow in either way the but blade profile is a push type and the airflow is way better.
"so i just went with the flow"
btw mine looks just like the one in the pic with the same black/blue wire combo but it has a silver D.O.R sticker on it (clockwise iirc)