RFC Destinations not working

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I am trying to connect PI dual stack to ECC. I have created two RFC destinations and both are not working.

RFC Destination of Type G, SAP_PROXY_ESR

RFC Destination of Type H, PI_AEX. Here the port number entered is 50,000. This is the port number maintained in the transaction SMICM ---Services.

I created connection to SLD in transaction SLDAPICUST and it also fails with error message:

Exception on SLD server: Error in processing of HTTP request: (417)Connect to host:50000 failed: NIEHOST_UNKNOWN(-2)

I checked the roles of the user in SU01 of ABAP stack

I found only two roles

SAP_XI_ADMINISTRATOR_J2EE

SAP_XI_CONTENT_ORGANIZER_J2EE

Is this because of that, inadequate roles that these RFCs and SLDAPICUST failing?

Should I add more roles in SU01 or Java stack?