Dryer vent help

[LargeCar]

Tried search and it does not seem to be working for me, maybe because I'm on my cell.

2009 Gulf Stream Caribbean 35A. Where do I drill the four inch hole in the side wall for the dryer vent so I miss all the important stuff in the wall?

Thanks for any help, pictures would be great.

New to this coach but not new to RVing. Lots of west coast volunteering so been a lot of places. Sticks and bricks in Bridge Creek Oklahoma, grew up in Portland Oregon and lived in several high Sierra towns as well.

Thanks for any help.

LargeCar