For openSUSE Factory ARM run the following as root:
zypper addrepo https://download.opensuse.org/repositories/X11:terminals/openSUSE_Factory_ARM/X11:terminals.repo
zypper refresh
zypper install terminus
For openSUSE Factory run the following as root:
zypper addrepo https://download.opensuse.org/repositories/X11:terminals/openSUSE_Factory/X11:terminals.repo
zypper refresh
zypper install terminus
For 15.5 run the following as root:
zypper addrepo https://download.opensuse.org/repositories/X11:terminals/15.5/X11:terminals.repo
zypper refresh
zypper install terminus