As I understand it, there is no "front PSU hole". It's installed in the front of the case, totally enclosed, with a power cable leading to an outlet on the back. Look at https://static1.squarespace.com/static/54622746e4b0a75b67f67486/t/56bd0dcd1d07c07ca7203dc4/1455230423148/?format=750w and...