Where to find device IDs in Zwave

How do you find the device ID?
So I can basically add it in the config for automation, customise, etc…
Like the example below where did aeon_labs_smart_energy_switch_switch2 come from in this example config?
Just did not know what log or place in home assistant to look in.

customize:
switch.aeon_labs_smart_energy_switch_switch_2:
friendly_name: Mac Switch-Meter

On the frontend, under Developer Tools, click the <> symbol and you will find all current entities.

thanks Alucard!