Integration Component field without BC Field reference

Hi,

I am trying to include couple of IC fields that have no reference to BC fields. For instance, I would like to pass 'StartRowNum' and 'PageSize' to the external system for a QueryPage scenario. And I don't want to the have these values passed in the Payload Header. Thus trying to create IC fields with no reference to BC fields and have the values passed by external system in the body of the payload. I set the Type of the IC fields to 'Custom'.

Note: This is a JMS service call, and we are providing the schema definition (.XSD) using generate schema. I see those fields in the XSD but,m when i run a query of the IO, I dont see these fields in the results. Please correct me if I am missing anything here.