[JRTJH]

The trailer didn't come from the factory with a battery, only the wiring "hanging in the compartment" and a battery box that "may or may not have been vented properly by the factory"... Essentially, just an empty box in the compartment and the wiring laying/hanging in the compartment"

So, that "connection job" is the work of some "genius at the dealership".... Maybe they had some reason (note I didn't say valid reason) for doing it that way, but......

I agree, there's no way it's supposed to be that hard to check the battery...