EGA=Enhanced Graphics adapter. Interface bus uses a 9-pin D-sub connector. This EGA standard  offered improved resolutions and more colors than CGA. EGA allowed graphical output up to 16 colors (chosen from a palette of 64) at screen resolutions of 640x350, or 80x25 text with 16 colors, all at a refresh rate of 60 Hz. The monitors have a digital interface.
9 pin D-SUB female connector at the videocard
9 pin D-SUB male connector at the monitor cable