Thank you for your quick reply.

I think the pinout in this documentation is wrong. It says:

1 Power on/off control connecting to switch 2 Ground 3 LED+ for battery low indicator 4 LED+ for power on, rebooting and shutdown

But shorting pin 1 and pin 2 has no effect.

Instead, shorting pin 2 and pin 4, I get the expected behavior like Power on and force shutdown (holding >8 seconds).

I have a X708 V2.0 if that makes a difference.

I have a normally open four pin momentary switch with build in LED. Like this one: amazon.de/gp/product/B07KCCLGXJ

1 LED + 2 LED - 3 S1 4 S2

Currently I connected S1 to pin 2 and S2 to pin 4 to make the switch working. Also I have connected LED + to pin 3 and LED - to pin 1 to make the LED working.

Even if everything works now, I wonder if everything is connected correctly?

Thank you.