The little cables are the LED lines, the power button, and the reset. They won't care about stray AC much and I'm thinking of removing the whole PSU cage and routing them around the other side.
I've looked at pcpartpicker build logs to see how this PSU and case have been handled.
There's really no room between the fans. Remember that the GPU riser needs to cover the fans.
I had to rotate one of the fans because a little piece of it interfered with the metal support plate at the back, by the PSU. I then removed that plate from the case, temporarily, to give better access to the connectors on the PSU under the HDD.