1. SAP Help Portal
SAP Ariba Cloud Integration Gateway Configuration Guide: "Roles and Authorizations for SAP Ariba Cloud Integration Gateway". This document lists the authorization objects delivered with the CIG add-on. It explicitly states:
ARBCIGPRG: Authorization object for special programs.
ARBCIGRFC: Authorization object for RFC.
ARBCIGSPR: Authorization object for SPRO.
ARBCIGCLS: Authorization object for CIG class.
(This information is consistently found in the configuration guides for various releases of the CIG add-on).
2. SAP Help Portal
SAP Ariba Cloud Integration Gateway Overview Guide: The "Security Information" section discusses the importance of assigning appropriate roles and authorizations
which include the objects for specific tasks like program execution (ARBCIGPRG) and configuration (ARBCIGSPR).