This side-mission can be found by entering the Normandy’s galaxy map and having the ship travel to the following location:
Caleston Rift > Solveig > Sinmara.
Scan the planet and locate the anomoly to begin the mission.
Move forward along the platform until you reach a console in front of a pair of blocked stairs. Use the console to engage in a bypass mini game. Once successful, the stairs will be climbable. Move up and activate the console in the center of the platform.
Look to the pipes on the floor. Hitting the console will cause an orange beam to appear along one of these. The orange beam indicates the flow of power and you are required to activate the three switches around the outside of the room. You will need to activate the switch on the left first, then the one on the right and finally the one opposite the stairs from where you entered. Once all three switches are activated, you will complete the mission.