To use an XSLT mapping in an integration flow, you must use XML as the input and output format. XSLT stands for Extensible Stylesheet Language Transformations, which is a language for transforming XML documents into other XML documents or other formats. An XSLT mapping consists of an XSLT stylesheet that defines the rules for transforming the source XML document into the target XML document. You can use an XSLT mapping step in an integration flow to apply an XSLT transformation to the message body. Reference: XSLT Mapping | SAP Help Portal, XSLT - W3Schools

To save a customer ID in a data store, you can use the WRITE operation. The WRITE operation allows you to store a value in a data store entry with a specified key. You can use the WRITE operation to create or update a data store entry with a customer ID as the key and a value as the payload. Reference: Modernize Integration with SAP Integration Suite | openSAP

To test a connection to a backend system that is provided by a Cloud Connector, you must specify the location ID as a parameter for the connection test. The location ID is a unique identifier that represents a Cloud Connector instance in a specific network location. It is used to route requests from SAP Integration Suite to the correct Cloud Connector instance and then to the backend system. You can find the location ID in the Cloud Connector administration UI under Configuration Location ID. Reference: Cloud Connector Connectivity Tests | SAP Help Portal, Cloud Connector Configuration | SAP Help Portal

You can use an HTTPS adapter to call an OData v4.0 interface in the Cloud Integration capability within SAP Integration Suite. An HTTPS adapter allows you to send and receive messages over HTTP or HTTPS protocols. You can use an HTTPS adapter to communicate with RESTful services, such as OData v4.0, that support HTTP methods and formats. Reference: Integration Software | SAP Integration Suite, Modernize Integration with SAP Integration Suite | openSAP

OData uses HTTP, AtomPub, and JSON as its core functionalities. OData is an open protocol that allows the creation and consumption of queryable and interoperable RESTful APIs in a simple and standard way. OData builds on HTTP as the application protocol for transferring data between clients and servers. OData uses AtomPub as one of the formats for representing data feeds and entries in XML. OData also uses JSON as another format for representing data feeds and entries in a lightweight and human-readable way. Reference: Introducing OData - SAP Learning, OData Overview | OData - The Best Way to REST