The Tekonsha Wire Replacement, part # 3020, for Dodge Vehicles is for vehicles that have the factory 7-way trailer connection installed and the wiring ran for the brake controller to a connector under the dash on the left side of the brake pedal, usually blue.
The Dodge Nitro does not come pre-wired with a 7-way connector in the rear or factory wiring pre-installed for a brake controller. You will need to hardwire your brake controller to the stoplight switch, battery, ground and trailer... view full answer...
I may have a solution for you, but mounting hardware for a grille guard is going to be manufacturer specific in most cases. If you've got the Aries Grille Guard # AA5051 then you can use the # AABRKT-5051 to replace your missing mounting brackets and hardware. If you've got a different brand then you'll need brackets specific to that grille guard. view full answer...
I am sorry but at this time a 7-Way to 6 Pole square adapter is not available.
You do have 2 options though. You could rewire the trailer connector to a Pollak Black Plastic, 7-Pole, RV-Style Trailer Connector - Trailer End, item # PK12706, using a circuit tester to verify each connection that needs to be made.
You could also build your own adapter to go between your vehicle and trailer. Use the 6-Pole Square Trailer Wiring Connector Kit (Car and Trailer Ends), item # 37995, and a Pollak... view full answer...