Find MANTIKOR's underground facilities

How do you complete "Find MANTIKOR's underground facilities"?

This is step 1 of 5 in A Dead End, given by Shani. It is completed on The Blue Gate.

• A Dead End
• The Blue Gate

What are the other objectives in A Dead End?

A Dead End has 5 objectives in total: Find MANTIKOR's underground facilities, Find a way into into the locked room in the Security Wing, Search the locked room for any records on Project Heartwood, Find the Dusty Film Reel and Deliver the Dusty Film Reel to Shani.