[Sales Order] use API to insert sales order with account id/name

[Sales Order] use API to insert sales order with account id/name

Zoho CRM API shows it is possible to insert sales order record by API as below, but "account name" nor "account id" are not included, does anyone know how to associate "uploaded sales order" and "existing account"? 

thank you 

https://www.zoho.com/crm/help/api/insertrecords.html