Does anybody know if I can take this harness and cut the end off I don't need and add an aux plug to it? This is on a 3rd gen Ram, RAZ head unit. I'm trying to get an aux-in without spending too much. I plan to get an aftermarket head unit it the future, so I don't wanna spend $50 on the other adapter. I can get the psxch3 on eBay for $7.