I need a wired FM modulator to connect my Xact Sirius satellite radio to my Mach 460. Transmission from the Xact internal modulator sucks.I bought a Sirius modulator at Best Buy. I dropped the glove box and pulled the antennaconnection, but the pieces didn't fit properly.

Does the modulator not connect in that location?Do I need some type of adaptors? Is there a specific modulator for the 2004 3.9L with Mach 460?

Thanks in advance.