Head across the Scablands toward the small pillar of light. That is the Vex Conflux you will be looking for. Just head for it. As you approach, a dark cloud will appear. The Vex are coming for you to protect the Vex Conflux.
This group of Vex are a number of Goblins and a Minotaur. Attack aggressively. If needed, there is a good bit of cover in the area. Just clear them out then approach the Vex Conflux and Deploy Ghost to have him access the Network.