Radio Delete Cars

i am toying with the idea of making my car a radio delete car bcoz i experimented with making the bezel for a radio delete and i didnt think it would work but i am really into the idea now

Point and question : on a factory radio delete car ...what was in place of the speaker in the dash?

it dont seem right to just leave the speaker grille open ....it would seem to me that a filler plate would have been there to prevent sunlight and foreign objects from getting through the speaker grille.

anyone have a factory radio delete car that knows this ?

Plus if i go radio delete i was planning to weld the antenna hole shut on the fender when i get around to painting the car ......did the factory radio delete all have antenna plugs or is it possible that the fender that was knowingly going on a radio delete car was never drilled for the antenna?