For SLE 15 SP3 run the following as root:
zypper addrepo https://download.opensuse.org/repositories/home:interstar001:Centreon/SLE_15_SP3/home:interstar001:Centreon.repo
zypper refresh
zypper install freetds-doc
For SLE 12 SP5 run the following as root:
zypper addrepo https://download.opensuse.org/repositories/home:interstar001:Centreon/SLE_12_SP5/home:interstar001:Centreon.repo
zypper refresh
zypper install freetds-doc
For SLE 12 SP4 run the following as root:
zypper addrepo https://download.opensuse.org/repositories/home:interstar001:Centreon/SLE_12_SP4/home:interstar001:Centreon.repo
zypper refresh
zypper install freetds-doc