yast2-branding-openSUSE from YaST:SLE-12:SP3 project
Select Your Operating System
Add repository and install manually
For openSUSE Leap 42.3 run the following as root:
zypper addrepo https://download.opensuse.org/repositories/YaST:SLE-12:SP3/openSUSE_Leap_42.3/YaST:SLE-12:SP3.repo zypper refresh zypper install yast2-branding-openSUSE