From the Notes section of the document you have linked to -
This has been tested on Raspbery Pi 3 and Raspberry Pi Zero. I'll keep updating this when I have time and eventually include a diagram of the connections.
More info on this can be found on https://www.easyprogramming.net/playgro ... ontrol.php
Feel free to ask questions on Easy Programming.
The developer/maintainer of the project seems the appropriate person to ask for further details and assistance.
The pin assignment used by the developer is specified in the script rgb.py, with a comment indicating that it needs to be changed to suit your installation.