A couple of custom components (e.g. https://github.com/DBuit/light-popup-card) have documentation that state:
HACS installation: Go to the hacs store and use the repo url
https://github.com/DBuit/light-popup-cardand add this as a custom repository under settings.
Call me stupid, blind, n00b, whatever, but I can’t seem to find where these settings are? I can find options in the integration, but that’s it.