How do I provide parameters to “wsimport” for JAX-WS from Intellij IDEA

I need to override the wsdlLocation parameter for wsimport (when using the JAX-WS webservice option in IntelliJ IDEA) to a relative path at the point of creating these files, as well as specifying where the output classes are generated. How do I go about this?

I'm using IntelliJ IDEA 2016.3.4