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UP2 power and reset button

I want to use the power and reset button for my application instead of the default auto power on when power is detected in dc connector. However I am not sure about which kind of switch should be installed.
Reset header CN3 seems to work just with a (ON)-OFF momentary switch. It should only close the circuit when pressed, and then board reboots.
But I dont understand the CN2 header. It seems like a ON-OFF switch would do the job. When switch is ON position (circuit closed) board does not power up even power is connected. If swicth goes to OFF position (open circuit) board boots.
I am not sure if I am correct beacuse it is strange. In this setup CN2 switch should be again turned to ON position after a soft-poweroff.
Is there anyone using the CN2 header?

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