TSM backs up local file systems by default. If 'dsmc q inclexcl' doesn't show that file system as being excluded, then it should be the case that you have Domain statements (dsmc q opt) which constrain what file systems are backed up, in which case you should simply add that file system to the Domains list. It is very unusual to have to use Include to have a file system participate in backups, given the standard methodology (which is to say, don't do that).
Richard Sims