Tekonsha Prodigy P2 proportional trailer brake controller with plug-in wiring adapter for Frontier. Purchased in 2014. Had this on my 2011 and then 2019 Frontier. Includes metal mounting bracket and screws. Does not include plastic mounting bracket. I used the metal mounting bracket on both my 2011 and 2019 Frontiers - mounted under steering wheel by my right knee. $80 shipped. Part numbers:

Prodigy P2 brake controller 90885
Plug-in wiring kit 3050-P