What Firewire Port?

I have a MacBook Pro 13" - mid 2012. I was trying to find a cable to connect from my External HD (Firewire 800 - 9 pin) to the supposed Firewire 800 Port on the device. I have tried 6 pin Firewire and 4 Pin Firewire but neither will fit. Can anyone tell me what Port it is. The Apple site carries no further information just to say it is a Firewire 800 port.
Much appreciated.

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