You replace the fans on the Kraken and set them to pull air out of the case with the radiator towards the interior of the case.
Ideally with a fan pulling air in from outside in back or top
I got a set of these: https://www.newegg.com/p/2YM-001V-00093?Item=9SIA9AB8J22878&nm_mc=TEMC-RMA-Approvel&cm_mmc=TEMC-RMA-Approvel-_-Content-_-text-_-
Honestly, though, I made my best bends manually