New-NAVWebServerInstance how to set helpserver

Quick and simple question: If I use new-NAVWebServerInstance, I can set several options. The thing I cannot find is how to set the helpserver and helpserver port. It can be changed in the web.config file, but that's an extra step I would like to avoid.

How can I set the helpserver and helpserver port using the Powershell new-NAVWebServerInstance cmdlet (or another cmdlet)?