That is true the Nissan is not a standard antenna therefore there are antenna adaptor available to convert that style into standard. We stock those parts. After that, you can plug in your wired fm modulator and you can get your satellite sound via a fm channel. Sound quality via fm modulated/fm transmitted not as good as direct connection. Acceptance depends on your pickiness.
The other way is to use a direct plug in adaptor which we offer your yr make model vehicle. This adaptor will provide a direct aux input into your radio. It’s the prefer way but will cost more. This adaptor can do ipod, aux or xm. XM you’ll need to find a xmd1000 which is a discontinued model. We don’t have any more. You’re on your own for finding one. Direct plug-in adaptors are better in sound.