Final answer:
The nurse should find the area of involvement on the back of the head, specifically at the occipital fontanel.
Step-by-step explanation:
The nurse should find the area of involvement on the back of the head. Two hours after birth, the newborn develops a soft swelling in the left parietal region, which corresponds to the occipital fontanel located at the back of the head. Fontanels are broad areas of fibrous connective tissue that form fibrous joints between the bones of the skull in a newborn. They gradually ossify and close as the bones of the skull develop and fuse together.