For SLE 15 SP5 run the following as root:
zypper addrepo https://download.opensuse.org/repositories/devel:sap:trento:factory/SLE_15_SP5/devel:sap:trento:factory.repo
zypper refresh
zypper install trento-web
For SLE 15 SP4 run the following as root:
zypper addrepo https://download.opensuse.org/repositories/devel:sap:trento:factory/SLE_15_SP4/devel:sap:trento:factory.repo
zypper refresh
zypper install trento-web
For SLE 15 SP3 run the following as root:
zypper addrepo https://download.opensuse.org/repositories/devel:sap:trento:factory/SLE_15_SP3/devel:sap:trento:factory.repo
zypper refresh
zypper install trento-web