And spaghetti means the PSU wiring.
The PSU is a tight squeeze and a daring task to put in, don't make my mistake. I advise you to insert it at an earlier stage as mentioned before.
"Shyte ... I should have gone with the OCZ PSU with UV reflective wiring", was what I figured here.
Anyway, with a PSU tester I enabled and checked the PSU + we can see if the fans are working.