In this case three configurations will be required each for port 8000, 6000 and 7000.
There would be three global elements defined for HTTP connections.
Each HTTP connection will have host and port. One example shown below with host as localhost and port
6000
Graphical user interface, application Description automatically generated

To use an HTTP listener, you need to declare a configuration with a corresponding connection. This declaration establishes the HTTP server that will listen to requests.
Additionally, you can configure a base path that applies to all listeners using the configuration.
* <http:listener-config name="HTTP_Listener_config" basePath="api/v1">
* <http:listener-connection host="0.0.0.0" port="8081" />
* </http:listener-config>
https://docs.mulesoft.com/http-connector/1.6/http-listener-ref#http-listener-configuration

The List operation returns an array of messages in which: Each message holds the file's content in its payload. The file's attributes section carries the file's metadata (such as name, creation time, and size). The payload is empty if the element is a folder.