idoc to idoc scenario - sap pi 7.3

Hi,

I am creating idoc-to-idoc in 7.3 ,I did configuration for InboundRA(Resource Adapter).My source Ecc5 and Receiver is Ecc6

1). I want to Know that RFC destination XI_IDOC_DEFAULT_DESTINATION is point my source or receiver system ?

Right now I configure it for my sources system Ecc5.

2).If i did configuration correct,but in communication channel monitoring, i got error in my Source communication channel ( Error  No ServiceIdentifier available for channel )

3). At my source system in Ecc5 I got error in SM58 (Error : Commit fault: ASJ.ejb.005043 (Failed in compon sap.com/com.sap.aii.ad)

Thanks