Guidance on integrating OpenAir with Salesforce and DarwinBox

Summary:

I have been exploring the OpenAir REST and XML API documentation to understand the system's capabilities for integration with Salesforce and DarwinBox.
I have encountered the following discrepancies:
The REST API documentation does not appear to include a Customer object.
Similarly, the REST and XML API documentations do not seem to provide information about the Employee object.
Customer Creation: How can a Salesforce user create a customer in OpenAir using the REST API?
Employee Creation: How can a DarwinBox system create an employee in OpenAir using the REST or XML API?
If there are alternative approaches or workarounds to achieve these functionalities, please provide guidance.