Aerial in rear window - do all Supras have a socket for it?

[Digsy]

Just wondering (and trying to avoid taking the interior trim off to find out for myself):

 

I just bought a replacement tailgate which has the secondary ICE aerial in it (wiring on the right hand side). When pulling down the roof lining to disconnect my current tailgate I found that although my car has the rubber boot to carry the connection, it does not have the wiring. I assume therefore that my car won't have a socket behind the trim to plug the aerial connection into? Or do all Supras have the socket in the wiring harness regardless of whether or not they have an aerial in the rear window.