Question about QoS setup

In Luci > Network > QoS, you are able to prioritize network traffic selected by addresses, ports or services after installing luci-app-qos:

Here is my question: under the Ports section dropdown, you can select “all” or you can enter ports manually, but can I specify several ports at once and if so, how do I separate them? For example, if I wanted QoS for a traffic on port 80 and 443 for a particular IP address, can I just type in 80, 443 separated by a comma? How can I verify that the QoS is working?

Will the below code work for my purposes?

uci set qos.cfg078143.ports=‘80, 443’

Thank you!