For SLE 15 SP2 run the following as root:
zypper addrepo https://download.opensuse.org/repositories/network:ha-clustering:sap-deployments:v4/SLE_15_SP2/network:ha-clustering:sap-deployments:v4.repo
zypper refresh
zypper install prometheus-ha_cluster_exporter
For SLE 15 run the following as root:
zypper addrepo https://download.opensuse.org/repositories/network:ha-clustering:sap-deployments:v4/SLE_15/network:ha-clustering:sap-deployments:v4.repo
zypper refresh
zypper install prometheus-ha_cluster_exporter