For SLE 15 SP7 run the following as root:
zypper addrepo https://download.opensuse.org/repositories/home:PSuarezHernandez:salt-sle15sp7/SLE_15_SP7/home:PSuarezHernandez:salt-sle15sp7.repo
zypper refresh
zypper install salt
For SLE 15 SP6 run the following as root:
zypper addrepo https://download.opensuse.org/repositories/home:PSuarezHernandez:salt-sle15sp7/SLE_15_SP6/home:PSuarezHernandez:salt-sle15sp7.repo
zypper refresh
zypper install salt
For SLE 15 SP5 run the following as root:
zypper addrepo https://download.opensuse.org/repositories/home:PSuarezHernandez:salt-sle15sp7/SLE_15_SP5/home:PSuarezHernandez:salt-sle15sp7.repo
zypper refresh
zypper install salt