Add these substitution to your YAML config on your S3 Box
substitutions:
loading_illustration_file: https://github.com/jlpouffier/home-assistant-s3-box-community-illustrations/raw/main/frenck/illustrations/loading.png
idle_illustration_file: https://github.com/jlpouffier/home-assistant-s3-box-community-illustrations/raw/main/frenck/illustrations/idle.png
listening_illustration_file: https://github.com/jlpouffier/home-assistant-s3-box-community-illustrations/raw/main/frenck/illustrations/listening.png
thinking_illustration_file: https://github.com/jlpouffier/home-assistant-s3-box-community-illustrations/raw/main/frenck/illustrations/thinking.png
replying_illustration_file: https://github.com/jlpouffier/home-assistant-s3-box-community-illustrations/raw/main/frenck/illustrations/replying.png
error_illustration_file: https://github.com/jlpouffier/home-assistant-s3-box-community-illustrations/raw/main/frenck/illustrations/error.png