1) Check for
existing unused/covered/hidden holes before drilling a new one.
2) To be well-informed on holes through walls
read the aforementioned link:
https://www.greenbuildingadvisor.com...-stop-using-it
In Florida, I've got aluminum awning windows, and simply drilled through the surrounding frame. (Easier to patch with metal + RTV + pop-rivets) against intrusive insects and vermin).