Activating Pairing Mode on a Generic Tuya Zigbee Smart Switch

Does anyone have any idea how to put this switch into pairing mode? I bought it in 2021 and remember being able to pair it with Zigbee2mqtt, but I don’t remember how I did it.

Now I’ve finally decided to install it in a project and can’t remember how to activate the device’s pairing mode.

It came without a manual and there’s no model number, but it is supported by Zigbee2mqtt.

Thank you.

Is the face plate detachable?

If so I’m betting there’s a button under there.

Yes, it is. However, there is no reset button, only the four channel buttons and the network LED.

I remember being able to activate pairing mode by pressing a combination of buttons, but I can’t recall which one.

I found the solution.

Pairing

Press any button 5 times, after this, 
click the button one more and hold the button.

Source