khelpcenter5 from KDE:Frameworks5 project
Select Your Operating System
Add repository and install manually
For Backports SLE 12 SP1 run the following as root:
zypper addrepo https://download.opensuse.org/repositories/KDE:Frameworks5/Backports_SLE_12_SP1/KDE:Frameworks5.repo zypper refresh zypper install khelpcenter5