ORC integrations with thirdparty applications

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Hi All,

Is there out of the box integration available between the following third party applications with ORC ( Oracle Recruiting Cloud in Oracle HCM , not TEE or TBE)? What is the best solution to achieve this integration where the customer wants to use these third party application in their implementation.

Third Party applications are :
- SHL 
- Sonru 
- XREF 

Reading  the Oracle documentation , I understand integrations can be configured with thirdparty tools by importing the configuration file through setup and maintenance (Manage Configuration Packages task) provided by the third party partner.
Is this true for only supported third party applications or can it be extended to any third party applications?