The only thing I would change is the wiring kit. I would use something like a TowDaddy (I think they were bought out by Hopkins) wiring kit which uses the existing bulbs. Think of these as pre-wired diodes.
Happy towing - Fits are great toads. Just follow Honda's towing directions if you have an automatic.
Roger & Mary
2014 Tiffin Phaeton 36GH
2012 Honda Fit toad