Adapter to convert Sirius/XM cable to fit in regular antenna input

[klrman]

What I am trying to do is make my Sirius/XM cable hook up to my aftermarket head unit's regular

antenna input behind the unit. Unit does not support Sirius, I know that, but I understand that I can get an adapter to make the unit accept the sirius/xm antenna cable for regular radio instead of changing roof antennas?

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[pickup1 5,000+ posts]

Um.... why? Are you trying to use the Sirius antenna as your regular antenna?... or trying to get Sirius thru your regular antenna?

 

[klrman]

I'm trying to use the car antenna that came stock, which I guess is the sirius antenna since it came stock with a sirius radio and there is only one antenna on my roof. What I want to do is hook up that antenna to a regular input on my aftermarket head unit and I figured I probably need some type of adapter to make it fit.