We have just what you're looking for. I recommend using the # C59496 because we've found that the converter boxes are a bit more reliable over time, so it's going to be a harness that can withstand the test of time. This harness will need to be hard wired into your tail lights, since there are no plug and play harnesses available for your 2014 Mitsubishi RVR.
If you don't already have a hitch and ball mount kit, I've added some recommendations for those below, as well.
Hitch: Curt # C13079
Ball... view full answer...