Was wondering if anybody has taken their dash apart to look at the antenna connection on the xm radio in the sonata, I have an audiovox xcr9 which I use in my home, my car and my boombox. I don't want to pay for another radio after my three months of free service is over. I want to know if i can use my portable unit and hook it into the antenna already in the car instead of running my magnetic antenna on the trunk.