which file should i copy to custom_components?

[hly1993]

which file should i copy to custom_components? and what's the directory structure after copy?
thank you!

[rytilahti]

The file contained in https://github.com/rytilahti/python-yeelightbt/tree/master/custom_components/light - it should follow the same structure, so go into ~/.homeassistant/custom_components/light/