we have the 2017,
what i did was order a rear hitch from curt hitches,
they make a class 3, adjustable that fits perfectly under the fiberglass bumper,
bolted it to the frame extentions, all heavy duty hardware, i actually added 2 pieces of angle iron to bolster the connection,
had to drill a few holes to match up with existing holes,
when we bought the rig it was rated for pulling 2000#, ( FR has since clarified that the rig can not be used to tow, anything,
i would never pull anything with it but it can certainly carry tongue weight of a few hundred lbs.
we bought and use a box, but can put a rack on if we want.
love the extra carrying ability. we just plan to keep the weight below 500 total. no problem
I will try to send a couple of pics, if i can figure out how to?
good luck