Finding the WBS code in cProjects tables

Hello,

I'm having difficulties finding the Internal ID of the WBS code for projects within the cProject.

I know that for projects within PS, I can refer to table RPM_OBJ_LINK and double click on the OBJECT_TYPE field in order to obtain the Internal ID of the WBS code (since the item is directly connected to the WBS code)

But for projects within the cProjects, it doesn't work the same way. The item is connected to the project which is then connected to the WBS.

I need help in finding the connecting table.

Thank you,

Ayelet