How to add SLES 15 Repos synced via SCC plugin to hosts / There is no subscription-manager for SLES15?

Problem:

While I can sync SLES 15 Repos using the SCC Plugin, how can I add them to my SLES 15 machines? Looks like there is no subscription-manager package available for SLES 15

Expected outcome:

Add SLES 15 Repos to SLES 15 machines

Foreman and Proxy versions:

Katello 3.18

Foreman and Proxy plugin versions:

tfm-rubygem-foreman_scc_manager-1.8.5-1.fm2_3.el7.noarch

Distribution and version:

CentOS 7.9.2009
SLES 15.x

Other relevant data: