With regions sent to SAP FSM and maintained transaction /PACG/ECM_P_GR (already done for SAP 300, company 8), all it takes for a user/employee to be sent with region data is have them assigned to a work center/region (current customizing - region) and manually sent them to FSM with transactions /PACG/ECM_USERMASTER and /PACG/ECM_EMPL.
Sending ERP user with region data
- Make sure the 'Object' field in transaction /PACG/ECM_P_GR is set to 'Address region'
- Make sure the testing user has a region maintained in transaction PA30 (infotype 'Addresses')
- Make sure this region has been sent to SAP FSM before.
- Send a user with transaction /PACG/ECM_USERMASTER – User.
- Go to WE05 and find an idoc of type /PACG/ECM_ITYPE_USER. The region data can be found in the 'regiondata' segment
- The region field of Person, type ERPuser ID is updated with a region.
- Send an employee object with transaction /PACG/ECM_EMPL. An idoc of type /PACG/ECM_ITYPE_USER is generated, also holding region segments.
The final result: 
Additional docs: https://proaxia-prod-doc.atlassian.net/wiki/spaces/PFCC/pages/70221952/Transferring+regions+from+SAP+to+FSM