After obtaining Warden’s Blight, shoot the basketball in the broken roof from Nexus Forge. Advance a round for the first symbol, then three more rounds for the others.
Click or tap each symbol on the photo as it appears. The numbered circles record your shooting order.
Tap the photo to place symbol 1.

Then activate Exfil, kill the HVT and take the portal into the house. Select a number and tap the photo to correct its position.
Focus the photo and use the arrow keys to aim. Hold Shift to move faster. Press Enter or Space to place the circle.