I’d like to note that openSUSE Leap 16.0 (RC) is missing the Cockpit module for administrating LDAP specifically the new standard 389-ds (replaces openldap). If I knew how, I would like to encourage the packagers to make this available - it is really useful and it is included in the sources of 389-ds on github.
Nevertheless, you may use a Fedora RPM and extract simply /usr/share/cockpit/389-console/. E.g. cockpit-389-ds-3.1.3-9.fc44.noarch.rpm worked like a charm. However its design is more blue than green like Fedora is. But I am sure you could change the css easily if you are familiar with cockpit on openSUSE (I am not).