My 300 wiring

Use this 2016 Chrysler 300 Custom Fit Vehicle Wiring - Curt
With the new molars the lightning is on the canbuss so just trying to wire in a standard plug the old fashion way tends to screw up everything.
I tried to wire my little trailer up to my 2014 ram p/u. The big trailer plug is hot for my car trailer, but the little 4 wire plug in is dead, and their one piece right on top of each other from the factory ..?????
I also bought a trailer brake controller off of ebay that plugged directly in to the empty dash plug in to make the trailer brakes work. Check it out , maybe save u some $ .