Provisioning through One Identity Manager connector

Hello experts,

I'm trying to set up the provisioning mechanism from the table Person to a custom table CCC_Person_Reporting from the same DB, through a simple One Identity Manager connector. For now I would like to just provision the INSERT.

I created the connector, the single object operation and the process (taking inspiration from the ADSAccount insert for example), but I'm having hard times understanding how to use the script DPR_GetAdHocData.

In the parameter "rootObjectKey" I tried many alternatives, for example the object key of the DPRSchema One Identity, but everything goes in error. So, what "rootObjectKey" should I use? 

If this can help, the error I get when I try the script is: "Connection data for <object key> could not be detected".

Thank you for your help,

Lucrezia