ADD new https connection with different port to a webserver

You can create another virtual Server with the same IP Address but different Port and use the Same Pool and Profiles of the other virtual Server. Would be also better for Troubleshooting cause it is seperated but does exactly the same. You might want to use Node Based Loadbalancing so the loadbalancing works with both Services.

In case u meant to use a different Port within the same Pool then just add the Node and choose a different Port. I Hope i understood your question.

Greetings, Maximilian Martin