question #3 Sahih al-Bukhari 3511, Book 61, Hadith 21 : What is the symbolic meaning of the ‘side of the head of Satan’ in Islamic tradition?

I heard Allah’s Messenger (ﷺ) on the pulpit saying, “Verily, afflictions (will start) from here,” pointing
towards the east, “whence the side of the head of Satan comes out.”