The reservoir is fed by two drain ports. When feeding a larger amount of water it's useful to have one for water coming in and another for air coming out:
Now here's the Iwaki Plus feed tube situated in the base. The cardboard box will be replaced with anti-vibration gel soon enough:
Here you see the gap between the Iwaki feeding tube and the tapped base of the EK reservoir:
I cut a piece of schedule 40 tube to size to glue in here:
Later I will paint all of the tubes so it doesn't look so bad

The cardboard box doesn't quite raise the Iwaki high enough so we'll need to swap that out:
But here it is fully connected:
And here's the whole side of the gaming case in it's temporary state:
Now we can add the 360 radiator back in quickly (30 seconds) due to the Koolance quick disconnect fittings and the CaseLabs side mount design:
I can't fit a 480 in because of the placement of the radiator and the feed tube. I may move it later, but for now this works. So it's time to fill up with water: