Matrox Morphis QxT Installation And Hardware Reference page 22

22 Chapter 2: Hardware installation
4. Connect the other end of the Matrox flat ribbon cable to the digital I/O connector
on the base board, shown below.
Video input
connector
Video output
connector
The cable connector will latch properly only when the red wire of the cable is
closest to the board's bracket.
Digital I/O
System reset
connector
connector