I have a 2005 Silverado with the Bose system in it with no XM radio. I am trying to wire in an AUX cable to the radio without having to use a FM bypass module. Is there anywhere I could splice into to wire the input in? Every video I have watched on it so far shows splicing into the XM transmitter. I am trying to make it look as factory as possible on the console so I do not want to just replace the head unit. Any advice would be much appreciated. Thank y'all.