Solution : https://service.sap.com/sap/support/notes/1642711 (SAP Service marketplace login required)
Key words : 
select model access step, model user request, access request 2010, model user, symptom create, connectors irrespective, terms ac10, solution implement, correction instruction, roles maintained
Related Notes : 
       
| 1640992 | Master Note for SAP Access Control 10.0 - Support Pack 7 | 
| 1619616 | UAM: Model user shows unauthorized connectors |