attaching a flex circuit to an intensifier module, the flex circuit comprising one or more light detectors and extending beyond a leading edge of the intensifier module;

inserting the intensifier module into a housing of the night-vision system;

folding the flex circuit to expose the one or more light detectors; and

optically coupling a display unit to an output side of the intensifier module of the night-vision system, the display unit configured to display graphical content in a field of view together with night-vision images from an output of the intensifier module of the night-vision system.