My house is an old ranch style one back from 1950s: open eaves with no soffit. I assume mounting the bullet cameras perpendicularly to the wall is my best option, and I really need some help on the wall/eaves/roof structure to figure out how/where to drill the hole so I don't accidentally drill a hole on the inside wall instead of a hole directly into the attic. I am attaching a picture of a corner here. Any help on Youtube video/construction blueprints is much appreciated!