For openSUSE Tumbleweed run the following as root:
zypper addrepo https://download.opensuse.org/repositories/systemsmanagement:orthos2:master/openSUSE_Tumbleweed/systemsmanagement:orthos2:master.repo
zypper refresh
zypper install orthos2
For 15.6 run the following as root:
zypper addrepo https://download.opensuse.org/repositories/systemsmanagement:orthos2:master/15.6/systemsmanagement:orthos2:master.repo
zypper refresh
zypper install orthos2
For 15.5 run the following as root:
zypper addrepo https://download.opensuse.org/repositories/systemsmanagement:orthos2:master/15.5/systemsmanagement:orthos2:master.repo
zypper refresh
zypper install orthos2
For 15.4 run the following as root:
zypper addrepo https://download.opensuse.org/repositories/systemsmanagement:orthos2:master/15.4/systemsmanagement:orthos2:master.repo
zypper refresh
zypper install orthos2