AEM Classic connector stores all data in your repository. There are 2 types of data
Configuration - which includes:
Settings profiles
Property mappings
Misc configuration (proxy; context; etc)
Metadata for submitted content
If you want to clone the configuration to a new AEM site then you need backup the configuration. Metadata should not be cloned because it depends on the actual site content.
Below list of paths for backup:
Configuration:
Everything under /etc/smartling, but exclude /etc/smartling/submissions because it contains metadata about submitted content
Everything under /content/smartling/propertyMappings
Everything under /var/smartling
All configuration under /apps/system/config which start with com.smartling
Metadata for submitted content:
Everything under /etc/smartling/submissions