What is Reddit's opinion ofRazer Auto Black Rear Spare Tire 15" 3rd Brake Light Extension Cable Wire Harness with Corrugated wire host cover for 07-17 Jeep Wrangler JK?
If you don't want to cut your existing wires, you could always buy a brake light extension wire and cut that instead. Something like this: https://www.amazon.com/dp/B0757WSHVP/
Popular alternatives to
Razer Auto Black Rear Spare...
Metra Axxess ASWC-1 Steering Wheel Control Interface