I recently posted this on the nv200 forum
I got a trailer hitch. Curt and a wiring harness from etrailer.
I was having work done on van so had them install the hitch, did wiring kit myself.
Hardest part was hiding wiring under the trim panels but was able to do a good job it's all well hidden.
It uses the European type converter box and worked right first time. Nice. Took a 2-3 hrs to do. But mainly plug and play.
Towed a small aluminum boat with some wood on top maybe a 700# load.
Keep the total GVRW well with in the limits and no issues at all
Transmission did not notice it and the van performed the same as when I had a 1500# load with no trailer.
The only reason for no trailer rating I understand is for the modified chassis for the american market.
Euro models have a tow rating. Trans is used on many other Nissans with towing capacity.
I also use the hitch socket for a bumper protector so when I get loaded with a forklift the hit it and not the tiny bumper.
FYI I have chevy city express version of the nv200.