API for PM Definition Last Service Date

We are doing data conversion from an existing maintenance tracking system into Oracle EAM.  We need to import all the "PM Schedule definitions".  As part of this we need to load the "Last service date" information to properly calculate when Oracle should next generate a work order for the given asset.  I have figured out how to use the API to load the PM schedules (eam_pmdef_pub.create_pm_def) but I cannot figure out how to load the "last service date" information?  All it does as of now is put sysdate in the fields which is not what we need/want.  How do I