Mini Carrier Board - Buzzer - DF13 - which is pin 1?

Today I discovered that the CubePilot Mini Carrier Board uses a DF13 connector for the buzzer.

I need to know which pin is Pin 1 on the buzzer DF13 port.

The docs for the Mini Carrier Board identifies Pin 1 for the GH connectors on the Carrier Board - but not the DF13 used for the buzzer.

Thank you for your help.