The Juke was never designed to tow. In fact I've heard certain warranty repairs being denied because of even the presence of a tow hitch. The owner's manual states on page 9-15 of the 2013 model "Do not tow a trailer with your vehicle".If I can't get this CVT to run cool without Towing then I certainly can't really do much Towing in the Juke
The only thing I have read about the plate adapter is it can leak. BUT it is a better flow design by far.
I would go with plate as see what happens.