I don't use the Sirius/XM feature on the Retrosound unit. I have the Sirius package where I can stream it through the app on my phone. So, satellite channels are streamed via bluetooth. I bought the higher end Retrosound unit mainly for the subwoofer output that I do use. Regular AM/FM antenna is hooked up through factory antenna. I'm sure you could go to Crutchfield and look up their XM satellite receivers and see what the recommended installation is. You can usually find the installation instructions for whatever they sell in the description somewhere.