I had honestly forgotten if they had run the wires over the insulation or under it. It probably would not have made much of a difference but the insulation would have helped a bit to keep the full weight of the wires off the sharp edges. I found photos that in fact show the insulation on top of the wires. Now add all the water that the insulation soaked up and there was a lot of weight bearing down on these wires.
Here you can see the dump valve cables routed under the water tanks. I am not sure what tank this is but that is irrelevant.
The c channel you see in the above picture is screwed in across the frame left to right. the channel has 4 screw holes in each side but only has 1 screw on each side. I believe that they were mounted upside down as it makes no sense to me to have the weight of these full tanks bearing on the small surface area that the open end of the c makes up. It is also good practice that these cables will be pinched under the load of the water.
Another example of no excuse wiring. I have never see this on a manufactured product before.
This sealant fell of pretty easily and why would anyone expect it not to? I believe the hose is the low water point. Notice the utility knife slash triangle cut for the round tube because it is just too hard to punch a round hole in corrugated plastic.