what company made the device this ribbon cable goes in?
did you try getting a cable from them?
it may be a custom-built cable made only for the device it was used in.
unless you know which conductor goes from which pin on one end to which pin on the other, you could damage your device.
example: on the i-o, pin one on the display connector on the main board does not go to pin one on the display.
recommend you be careful.