The Goal

1. Add New Bones

- Select the object ⬆️

- Cursor to selected ⬆️

- Add a new bone then adjust its length ⬆️

- Select the head of the bone ⬆️

- Extrude the bone on the Y axis ⬆️

- Select the object ⬆️

- Cursor to selected ⬆️

- Select the tail of the bone ⬆️

- Selection to cursor ⬆️

- This is what we have now ⬆️

- Change the bones names ⬆️
2. Parent Neck Position

- Select neck_position then shift select the bone rear 4 ⬆️

- Keep offset ⬆️