Antenna installation on a ‘63 Valiant

The fender may have been changed at some point with one that had a radio, or, someone drilled a hole to add an antenna and routed the cable some other way. All the early A-bodies I've seen that were radio delete didn't have a hole in the fender for an antenna. Photo of the hole and delete plate? Is the hole nice and clean like a factory cut?
Yes, nice clean cut - I suppose someone could have plugged with their own grommet, but it looked designed for it. Unfortunately the plug disintegrated when I removed it.