For openSUSE Tumbleweed run the following as root:
zypper addrepo https://download.opensuse.org/repositories/home:npower:samba_WSP/openSUSE_Tumbleweed/home:npower:samba_WSP.repo
zypper refresh
zypper install samba-winbind
For openSUSE Factory run the following as root:
zypper addrepo https://download.opensuse.org/repositories/home:npower:samba_WSP/openSUSE_Factory/home:npower:samba_WSP.repo
zypper refresh
zypper install samba-winbind
For 15.6 run the following as root:
zypper addrepo https://download.opensuse.org/repositories/home:npower:samba_WSP/15.6/home:npower:samba_WSP.repo
zypper refresh
zypper install samba-winbind