Yeah, the backside of the mobo tray is a nightmare. everything runs through and then back out wherever necessary. The worst part about the wiring like that is if you have to replace the PSU. I had a less-than-quality 700W in there that the 12V line was dipping pretty bad when I had the system under load. It took me close to an hour to swap from that one to the current 650HX corsair piece.
For anyone that is looking for a new PSU - Corsair HX series. /questioning.
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