Yes, it does look like a DIY job - Not a professional job.
What lurks under may be a lot worse - and dangerous, if it's like mine:
2 examples of wires just sitting on top of the thin edge of the frame. Given some time and the vibration and wind whipping, it's sure to rub the insulation off and short circuit to the frame. Would not be fun when the blue wire in the lower photo shorts. It's for the electric brakes.
What is really dumb is that at other points the wires are properly run through an insulating bushing. See below:
This proves that someone knows how to do it properly, but is not consistent.
I suggest that anyone reading this take a look under their unit and look for similar dangers. Grounds for a recall, IMO.
I repaired this flaw by encasing the wires inside 1/2 inch poly tubing: