Hello, I recently did the uconnect 5.0 to 8.4 upgrade and was wondering about the antennas. I bought a gps antenna and installed it in the yellow/curry port and it is working. But how do i add sirius antenna? I believe it uses the same port. Infotainment has a dual antenna for $106 but wanted to avoid paying that much for antenna since my gps antenna was only $10. Is there only 1 port for sirius and gps? Do i need to get the dual antenna?