Hi Renato,
I understand that you want to add one more role to the BP that is coming with the Insert Task. And this has to be done in CRM system. If this is the requirement, you can go ahead and append a role to the BUS_EI_EXTERN structure after checking the task in the following extern structure.
HEADER-OBJECT_TASK.
If this is Insert task, you can add the role you want to in the Central data, roles structure. This can be perfomed in a Z module which is registered before the Module BUPA_INBOUND_MAIN_CENTRAL. If you have added the role directly in the processing structures, APIs will take care of adding the roles for this BP. I guess this will help.
Regards,
Venkat