NX What should the reference type be for the am.xml file upload?

When setting up NX additive manufacturing in a Teamcenter managed environment, the user has the option to store the am.xml file defining the support library in TC.  The documentation link below has basic instructions, but does not specify the reference type to store this file.

https://docs.sw.siemens.com/en-US/doc/209349590/PL20230425446868577.xid1415830/xid2055907?audience=external

This function is tied to a Customer Default in NX:

The pointer here indicates the location in Teamcenter where the xml file is stored, as per documentation:

When you select the am.xml file for upload, the software will detect the file type and automatically switch to the "XML-File" reference type: