I have a 2005 Crossfire with the factory navigation unit. I am attemting to add XM radio using an FM direct adaptor. I purchased male and female european antenna adaptors. they are Metra brand, model 40-EU10 and 40-EU20. I took the stereo out to add the Fm dierect adaptor But the adaptors will fit neither the stereo or antenna lead. I have looked around this forum and these apear to be the correct adaptors. What gives? Am I doing something wrong, or are the adaptors different for the navi unit?