Books : Where to find Sales order from a Project

Books : Where to find Sales order from a Project

Hi Zoho Developers,

From a Books Project, I have to push data to Creator, through a deluge script. From the Project data, I can't find Sales Orders and Purchase Orders links to that project.

Where should I look to get SO and PO linked to the project ? Should I fetch all SO and filter by project ID ? or is there another way ?

Regards,