Please check if this metalink note will be of any help to you. Here they have mentioned for coexistence model, but i guess this gives us information on how data can be migrated from EBiz to Fusion HCM.
An Overview of the Main HR2HR Integration Stages in the Fusion HCM CoExistence Model [ID 1332571.1]
Kindly let me know if this work, as even i have a similar requirement to work. But currently i do not have any access to the fusion instance, so i wasn't able to test this.