Which actually has nothing to do with the TP-Link component or devices at all. 
Again, this has nothing to do with the component.
There is only ONE configuration.yaml file that manages your entire Home Assistant. THAT is the file you are supposed to edit.
This is all covered in the documentation of Home Assistant.
You know that directory on your NAS that you thought was the root of the Docker? See that configuration.yaml file? THAT is your config file for practically EVERY component in Home Assistant.