DgnModelRef get masterOrigin

I am trying to improve upon my program that clips all of the reference files to a shape.  

I need to find out the masterOrigin of the DgnModelRef in order to do this.

I have looked into mdlRefFile_getParameters(...) , but none of the parameters shown under mdlRefFile_setParameters is the masterOrigin.

There is a REFERENCE_CLIP_ROTMATRIX for angle, unless it is REFERENCE_SCALE_BY_UNITS or REFERENCE_LOCATE.

I have looked into mdlRefFile_getInfo, but this gives me a pointer to a ReferenceFile structure (as in ReferenceFile.h), but none of the functions give me the masterOrigin.  

I was able to find a referenceFileElm structure that contains the DPoint3d masterOrigin (which is what I want), but I am unsure how to get a reference to this structure for my DgnModelRef.  

Thank you for your continued help,

Chad