SignForms and Contracts created outside of CRM do not import to CRM

SignForms and Contracts created outside of CRM do not import to CRM

Is there a way to link previously signed contracts from Zoho Sign to our CRM?  We hav the connection set up, but it only seems to link contract actually sent from the CRM, not the ones sent from Zoho Sign, and not the SignForms we created.  Any help here would be greatly appreciated.