The Genshin Impact Sumeru Archon Quest Chapter III: Act V - Akasha Pulses, the Kalpa Flame Rises is divided into five sub-quests, the third of which is called Jnagarbha Day. After being locked up by the scholars thanks to Alhaitham's efforts, you must find a way to connect to Nahida's consciousness, which is trapped in the Sanctuary of Surasthana.
Since this is a special story segment, you'll be controlling the Traveler and won't have access to the World Map. The mini-map will also be blacked out. If you choose to leave, you can return and continue any time.
How to connect to Nahida's consciousness in the Genshin Impact Sumeru Archon Quest
During this segment, your Akasha Terminal will glow based on your proximity to various signal points, indicated by glowing spots around the room. Since the mini-map is blacked out, you must rely on the Akasha Terminal to find the best spot to connect to Nahida. The closer you are to a glowing spot, the brighter the Akasha Terminal will glow.
To find the exact signal point you need to connect to Nahida, you must first enter the library behind the trees. There are many glowing spots inside, but only one has a strong signal to connect to Nahida.
Face north and keep going until you find a bookshelf blocked by trees and rubble, pictured above. Once you spot it, turn right to find a glowing spot behind the tree. Interact with it to Investigate the signal and eventually build a connection with Nahida's consciousness.
What better way to connect to Nahida than to play her yourself? Check out our Genshin Impact Nahida farming guide to build your Dendro Archon.