Where is the 'Foramen of Winslow' located anatomically?

The lesser omentum attaches between the liver, stomach, and proximal poion of the duodenum. It forms a sac known as the omental bursa, which forms a subdivision of the peritoneal cavity known as the lesser sac. The greater sac is the remaining pa of the peritoneal cavity. The greater and lesser sacs communicate with each other through the epiploic foramen (of Winslow). Ref: Moon D.A., Foreman K.B., Albeine K.H. (2011). Chapter 8. Serous Membranes of the Abdominal Cavity. In D.A. Moon, K.B. Foreman, K.H. Albeine (Eds), The Big Picture: Gross Anatomy.