HOLOLENS 2 RESEARCH MODE COORDINATE SYSTEM AND ROTOTRANSLATIONS BETWEEN SENSORS

My research activity focuses on Eye-Tracking using Hololens 2. Currently, my project is at a standstill because I don't have access to information regarding the position of what is referred to as RigNode, and I'm not familiar with the relative positions and transformations between the various sensors (cameras) of Hololens 2. Could you please let me know where I can find such information? 