Use Workforce OOB template/BR with RTPs and DTPs in a custom groovy script

I have requirement where I need to Transfer bulk employees in the OOB WF module (Using the OOB BR OWP_Transfer, or the included OOB templates OWP_Transfer_T, & other 2).

The way we are collecting this information is in a Budget Transfer cube form where each employee's ID, Job grade, CC (and other dim members) are stored in separate stat Account members with text data type.
For example:
Employee ID Job, Sending CC, Receiving CC, Sending Entity, Receiving Entity
E1234567, Job1,CC_001,CC_002,EN_001,EN_002

I have a prepared a groovy which sets all these text values to their own variables (empID,empSendCC,empRecCC,empSendEnt,empRecEnt).