On distros like SUSE where ssh config dropins in /usr are supported, there's no need for a symlink in /etc/ssh/ssh_config.d/ that points to the dropin installed somewhere in /usr (that is not reachable by ssh).
On distros like SUSE where ssh config dropins in /usr are supported, there's no need for a symlink in /etc/ssh/ssh_config.d/ that points to the dropin installed somewhere in /usr (that is not reachable by ssh).