This^^^ front and back.In the second pic, it looks like there's a soffit gap around 1.5" between the roof and the wall? I'd open that entire soffit to around 5"and cover with HC.
Add generous fascia to rafter ends to help block wind.
Can add thick furnace filter to gaps to dampen wind and block snow.
https://www.backyardchickens.com/articles/ventilation-baffling.75434/
Here's how to add your general geographical location to your profile.We are in northwest Iowa
It's easy to do, and then it's always there!