Well, kind of answered my own questions. Here's some info gathered:
The hitch available is pictured in the accessories cataloge. European version. They say Renegde Trailer Tow Group option will come with:
Class III receiver hitch, seven-and-four-pin wiring harness and full-size spare (with Latitude and Limited)
And elsewhere: Class III Trailer Hitch Receivers:
Designed for trucks, vans and sport utility vehicles
2" x 2" receiver hitch opening
Rated up to 6,000 lbs GTW with 600 lbs TW
Allows for more gear to be carried or towed
Works with all Class III accessories, such as bike racks, cargo carriers, and tube covers
Class I and Class II (1-1/4") hitch accessories can also be used with an adapter
Ball mounts are sold separately.
Will work with hitch balls with 1" diameter shank
NOTE: Most manufacturers call any hitch with a 2" x 2" opening a Class III hitch
It is not uncommon to see a 2" hitch rated at 3,500 lbs GTW called a Class III hitch.