Hi @Norm,
this is not a Local Check. Please do not advise putting non-Local-Check scripts in the directory for local checks.
The script @Gamienator found is an agent plugin and belongs into the plugins directory. What is missing is the check plugin.
Information about writing agent based checks can be found in the legacy documentation at https://checkmk.com/cms_legacy_writing_checks.html
The original author should provide the check plugin as we would have to guess on how to interpret the data generated by the agent plugin.