This is actually how they come from the manufacturer... I purchased the Prodigy P3. Great controller!
Your new controller will come with a pig tail plug (on side is loose wires and the other the clip that goes into controller). You will need to read the directions and match the colors as indicated. It is actually pretty easy to pull off... Did mine in about 20 minutes, including triple checking my work.
Now, if you don't have the factory "pre-wiring" for a brake controller you will have a long and complicated process ahead of you. Unless of course you are in the business, which I guess not since you are here...
2018 Cherokee 274DBH
2012 GMC Sierra 1500
4x4, Crew Cab, 5.3 KDL HD Cooling, 3.42 ratio
Recurve R6 WDH w/Sway Control & SumoSprings
Days Traveled:2019-37 / 2018-30