Removing the hinge
In my haste, I chose to pry and bend the keypad part of the hinge to clear the post that fits into the hole located at arrow 1, being careful not to tear the bus connector that slides out through a slot at this location.
The correct way to remove the hinge would be to insert a special tool, (which I don’t have at my disposal), into the hole located at arrow 2 and pull back the spring-loaded post that sticks out of the center part of the hinge. This will be clear in the next photo.