Antenna cable hole '65 Barracuda

Surprising as it is, my Formula S was a radio delete car. I am installing a radio, so I need to install an antenna. I need help determining where the hole should be for the antenna cable where it enters the cabin under the dash. The FSM shows a nice template for the fender antenna location, but not a word on the hole for the cable. If anyone happens to have their '65 (Barracuda or Valiant with factory radio) car apart, a photo showing where that cable comes in would be great.