BOM explosion

We have developed a report which explodes multiple BOMs.

The FM we have used in this report is CS_BOM_EXPL_MAT_V2 to explode the BOMs.

Now, we are required to add a selection field "Change Number " in the selection screen.

This FM , CS_BOM_EXPL_MAT_V2, when executed gives the Change numbers in the output (AENNR in table STB).

But it does not have this field AENNR as an import parameter.

In this case how can I add the Change Number in the Selection ?