Becker Grand Prix antenna jack

[DieselFitter]

Dear Diesel Demons:

I have an '83 300D with the stock Becker Grand Prix and was wondering if the antenna jack is the standard type or something different. I've searched and searched on this forum and can't find the answer.

I'm asking because I recently installed Sirius Satellite Radio in my car and found on they make an FM switcher box which will let me go from the FM transmitter out on my Sirius cradle to the antenna jack in of the Becker. That is, if it's a standard jack.

Any help on this would be greatly appreciated.

All best,

Diesel Fitter