Access the H.E.L.M. via the Director and select "A Hollow Coronation." Then connect the recovered Atlas Skews to an Atlas Terminal.
With the Atlas Skews collected, the star chart expands in your Wayfinder's Compass. Each Skew provides a portion of a sequence that can be used by the Caliburn Gatehouse to create a bridge to a hidden location. There are still missing pieces you will need.
"The Gatehouse awaits, as do more of my brother's naïve fictionalized opinions…" —Queen Mara Sov