What's up guys, recently purchased a 2013 Edge SEL with Navi, Sync, Non-Sony system. Looking to add an amp/sub to the stock unit. I know I need to add some type of Line Out Converter to get an RCA/Amp out. My question is, does anyone, Metra perhaps make a "pigtail" style harness that goes between the stock head unit and the factory head unit harness or do I need to get the traditional LOC converter and splice it into the head unit wiring? I would prefer to not splice into the factory wiring if possible. Thanks in advance for the help!
-Charles