Meh tidying the back of the case, I did that, iv just made a quick paint mock up of behind my motherboard tray, had too many beers tonight to be messing with my pc taking photos,
this is a mock up of behind my motherboard tray, the blue cables are cables from my psu, basically start with the longest cable you have and then you anchor it into a right angle position, then find the second longest, cable tie it to the same corner or the tie wrap you used on the first one, then the third longest cable, and keep on doing that, ensures all the cables are flat to the motherboard tray well behind it, and the red wires in my picture are my fans which have long wires due to being plugged into a fan controller.
hope this helps
Edit: no idea why I put my fancontroller wires in the picture to the psu hole, my fan controllers in a dvd drive bay ofc, the wires pretty much go to where they make there anchor point in the picture, and iv just wrapped them up in a loop and anchored them there because they go up and above the mobo tray to my radiator.
defo had too much ale tonite!