'69 Dart Radio delete question

I've got a '69 dart GTS. I put it on the GTS registry and was told that it was a radio delete. It could be, I can't find any wiring to indicate there was a radio - but who knows for sure. I am reasonably confident that the passenger fender is the original - except that it has a hole in it for mounting an antenna. My question is....... is there such a thing as a radio delete fender, did they just stick an antenna delete plug of some type in there, or does the dealer punch a hole in it if required or.............what?
Daryl