Pom.xml outside intelliJ project root ?

Hi,

I have a intelliJ project for which all sources are located in other folders, which are not sub-directories of the project root.

The pom.xml file that define the build is located in one of those sources folder.

When I add maven support to my project, IntelliJ creates a pom.xml file inside it's project root.
I want to declare the correct pom.xml file as the one to use for maven build, however, I did not understand how

What can I do ?