Where would I upload a new zen cart template in Hostmonster?

I tried to upload the whole folder in the directory includes/templates where also the default classic folder is but it does not show up in the admin then.

My new template has a source and template folder as well as a index.html file.

May I ask someone for help?

A Hostmonster rep advised me to asked this forum since he does not know any other fix than uploading it into includes/templates.

Thank you