There's a good assisted hatch thread around here somewhere - it would be useful to bone up on the anatomy and structure of the membrane, and the orientation of the chick relative to the air cell.
These are both great articles on assisted hatching:
https://www.backyardchickens.com/articles/step-by-step-guide-to-assisted-hatching.64660/
https://www.backyardchickens.com/articles/guide-to-assisted-hatching-for-all-poultry.72886/