Like you mentioned, the Curt trailer wiring harness # C56206 for the 2014 Nissan Versa Note does not require a direct connection to the vehicle battery whereas Tow Ready harness # 118582 does.
At the back of the vehicle the installation of the harnesses will be the same. The only difference is that power wire on the Tow Ready harness. That power wire is what will power the trailer lights. With the Curt harness the trailer lights will be drawing on the vehicle tail light wiring.
Modern... view full answer...
The Curt # C11378 is the only hitch available for your 2017 Nissa Versa Note. It features a no-drill application, but it does require some fascia trimming. This Curt hitch offers a nice installed appearance, since its main cross tube will be hidden behind the rear fascia panel as shown in the linked photo.
Instructions are included with the hitch, along with all of the required mounting hardware. I also included for you a complete installation video that gives you the step-by-step process.... view full answer...