Zoho Books, Related List for CRM cases

Zoho Books, Related List for CRM cases

We’re transitioning to zoho finance  

Currently we use CRM and relate CRM cases to CRM sales orders. 

We want to link a Books Sales Order and a CRM Case and Books Contact to their CRM Cases

How would I go about relating a books sales order (and it’s invoice) to a CRM case using a related list? I presume this is possible via deluge?

Appreciate any feedback in advance.