a trailer hitch
In John Grisham's "Firm", chapter 13, page 204 which describes a shabby trailer park, says :
"It was more like a slum on wheels, or a project with a trailer hitch.",
"One window above the trailer hitch was badly cracked and held together with gray electrical tape."
what does "hitch" mean here, is it a part of a trailer? I looked up dictionaries and could not find out.
thanks a lot