For openSUSE Tumbleweed run the following as root:
zypper addrepo https://download.opensuse.org/repositories/home:M0ses:tmate/openSUSE_Tumbleweed/home:M0ses:tmate.repo
zypper refresh
zypper install tmcs
For 15.4 run the following as root:
zypper addrepo https://download.opensuse.org/repositories/home:M0ses:tmate/15.4/home:M0ses:tmate.repo
zypper refresh
zypper install tmcs
For 15.3 run the following as root:
zypper addrepo https://download.opensuse.org/repositories/home:M0ses:tmate/15.3/home:M0ses:tmate.repo
zypper refresh
zypper install tmcs