When establishing direct connectivity for SAP Ariba Cloud Integration Gateway (CIG), the SAP Cloud Connector is a mandatory component for securing the inbound communication from CIG to the on-premise SAP ERP or S/4HANA system. During the Cloud Connector setup, a unique "Location ID" is defined to identify the specific on-premise system landscape. This same Location ID must then be entered in the corresponding HTTP Destination configuration on the SAP Business Technology Platform (BTP). CIG uses this destination to route messages, ensuring they are sent through the correct secure tunnel to the intended on-premise system.

B. Location ID of CIG's data center: The physical location of a CIG data center is not used as a logical routing identifier in the BTP destination or Cloud Connector configuration.

C. Location ID of SAP's installation: This option is too generic. The "Location ID" is a specific technical identifier defined in the SAP Cloud Connector, not a general installation ID.

D. Location ID of SAP Process Integration/Process Orchestration: Using SAP PI/PO constitutes a "mediated connectivity" scenario, which is distinct from the "direct connectivity" scenario specified in the question.

1. SAP Help Portal - SAP Ariba Cloud Integration Gateway: In the guide "Setting up SAP Ariba Cloud Integration Gateway

" the section on configuring the SAP Cloud Connector and BTP destinations explicitly states the requirement. It details the process: "In the Destination Configuration section

enter the Location ID. The location ID that you specify here must be the same as the one specified in the SAP Cloud Connector." This confirms that the Location ID from the Cloud Connector is the correct value. (Refer to the SAP Help Portal for the latest version of the "Setting up SAP Ariba Cloud Integration Gateway" guide

specifically the chapter on connectivity setup).

2. SAP Help Portal - Cloud Connector Documentation: The official documentation for the SAP Cloud Connector

under "Configure Access Control (HTTP)

" explains that the "Location ID is an optional setting that can be used to connect several Cloud Connectors to the same subaccount... It is used as a routing information in the destination configuration." This highlights the function of the Location ID in routing requests from the cloud (like CIG) to the on-premise system. (Refer to the SAP Help Portal

"Cloud Connector" > "Configuration" > "Configure Access Control").