Connecting to a CICS® Transaction Server for z/OS® application involves creating a message flow, building a message, and processing the response from the CICSRequest node.
You can change the connection details for the CICSRequest node by using the CICSConnection configurable service, as described in Changing connection information for the CICSRequest node.
The CICSRequest node can also use an identity that is present on an input message, and propagate it to CICS, by using the Propagate property on the security profile that is defined for the node. For more information, see Propagating security credentials to CICS Transaction Server for z/OS