my Corn Pro has the wiring all inside tubing.  The taillight wiring goes along where the roof and sidewall meet inside a tube up high and out of road salt, etc. Axle brake wiring is also very well protected. The hitch area is very heavy duty. 

As with all of them, they do seem to give you too much wire at the truck plug-in. You just have to wrap it around the jack so it doesn't drag on the ground. There must be a trailer standard for wire length because all of the bumper pull trailers seem to have too long a wire - for my Dodge at least.

Was the one you looked at 7 ft tall x 7 ft wide?

Jim at Dawn

Here's a picture of the hitch area from their website. Heavy duty but wire is too long for me. I just wrap it around jack as they show.