Had some free time to finish up the leak testing, pulled the paper towels, sorted out to fan wires, and ran them out the back to pair with a 5 way fan splitter. I opted for a simple Phobya 5 way+Molex power because I really don't need a fan controller for this build.
Front cleaned up (haven't pulled the fan connectors taut yet):
The back side was a tight fit for the AX1200i. The PSU support had to be moved back to the furthest setting to fit snugly, and the SATA hot swap connectors that connect the WD Red had to be carefully held out of the way for the PSU to fit. You can see how snugly the hard drive cage fits in it's stock location. Yes, you're able to move it, but I opted not to.
Now to figure out how to not create a birds nest in here. The end goal is to individually sleeve the cables, but I think I'm going to hold off on that for a bit and just get everything up and running.