Comment # 3 on bug 911202 from Uwe Geuder

I remember in 13.1 (or was it already 12.2?) the location
/etc/pki/trust/anchors was indeed undocumented.

But in 13.2 as of today the location is clearly stated
on the man page update-ca-certificates(1).

The information in /usr/share/doc/packages/ca-certificates/README could of
course be improved by stating that administrators should install certificates
/etc/pki/trust/anchors if that is the correct location (currently it does not
work as reported in https://bugzilla.opensuse.org/show_bug.cgi?id=918944 and
https://bugzilla.opensuse.org/show_bug.cgi?id=936709)