Geyserwala

I am trying to add integration with the Geyserwala deice. The github page saya to copy files into the directory …homeassistant/core/… But using Samba share I don’t find the core directory. How do I get to the core directory. I am running home assisatnt on the raspberry pi with HASS OS.

Then the directory should be custom_components/thingwala_geyserwala (I think)