certificate reuse -> what name?

[cdebackere]

As part of nmp it manages the certificates/renewal with letsencrypt.
I want to use the same cert's (and auto renewal) for some other docker containers, which is possible because the certs are 'volumed' to the actual fs.

But when looking into the letsencrupt folder, I don't see domain names but npm-1, etc. I understand this is becasue 1 cert config can hold several domains, fine. But it would be nice if somethere in npm I can see this name so I can tell which ceertificate is found where in the fs

Or am I overlooking something?
C.