Eclipse - How to bypass the standard directory str

Question

I am converting my existing project into maven but the point at which I am getting stuck is that I don't want to use the standard src/main/java structure.

I thought How to edit the directory structure in Maven? might help, but from what I understood it gives a way to append a directory path before src/main/java. This is the solution suggested in post that I am referring to:

<sourceDirectory>${project.basedir}/src/main/java</sourceDirectory>
    <testSourceDirectory>${project.basedir}/src/test/java</testSourceDirectory>
    <resources>
      <resource>
        <directory>${project.basedir}/src/main/resources</directory>
      </resource>
    </resources>
    <testResources>
      <testResource>
        <directory>${project.basedir}/src/test/resources</directory>
      </testResource>
    </testResources> 

Whereas, in my case I want to be able to completely configure the source and build/output directories as I can't alter my existing directory structure. Is there a way to do that?