TCP/UDP Ports Required to Link HCO and SWO using Platform Connect

Hi everyone,

I have a simple but hopefully not stupid question. What TCP/UDP port(s) are required to link HCO to SWO using the Platform Connect mechanism?

I understand Platform Connect as being an API client of sorts based on the need for an API key and use of TLS 1.2 to secure the HCO to SWO link. Would there be any other ports required for the connection?