You could zip tie your sata cable to the side of the hd cage as close to your hd as you can get it so it isn't hanging down like that. It looks like the extra cables you have are knotted together, if you straightened them out some, then sorta folded them together and secured them like that you might be able to get them out of the way some. Could probably include your 8 pin power connector in that so it won't hang down off to the side like it is now.
The extra PSU cables are zipped tied together in two groups. It's just that they are so long even folded that they don't push in all the way into the drive bay.
Are you suggesting I should try to zip tie some of my PSU cables to one of the bays? Not sure if there'd be enough room for them all.
By the way, the one SATA cable is ran through two holes on the HDD drive, so it's really not just hanging there. I'm not sure if I can zip tie them better to the HDD bay without bending them, as they stick straight out of the SATA ports - they're not angled connectors.