Concordion execute Fixture different project

I have one root maven project with multiple modules, and every one of each has its own integration tests.

I've created another module under root which has to have a summary of all the tests in the different modules.

I know there is concordion run command, but I don't know how to refer to the concordion specification html files of the other projects.

<a concordion:run="concordion" href="pathToOtherProject/Calculator.html">Calculator Service Specifications</a>

Thanks.