There is no map for this area, so just envision your squad sitting quietly in one of the Citadel Station's many elevators. Conjured that image? Ok, so after the Council has promoted you into the ranks of the Spectres, take any such elevator to catch two specific news videos.

The first vid reports that a survey team has recently dropped out of contact in the Hades Gamma cluster, which will end up triggering the "UNC: Missing Survey Team" assignment. If you want to investigate the survey team's whereabouts yourself, you should make a visit to the planet of Trebin in the Antaeus system of the Hades Gamma cluster the next time you're onboard the Normandy.

The second vid reports that fanatical biotics have kidnapped the chairman of the Parliament Subcommittee on Transhuman Studios and are now holed up in a derelict freighter in the Farinata system. This news triggers the "UNC: Hostage" assignment, which will bring you to the MSV Ontario in the Farinata system of the Hades Gamma cluster.

There are other news videos that play during your elevator downtime, but these are the only two that will actually trigger new assignments.