Relation between sales order and service notification in the TX IQS1 or IQS2

Hi Masters, i need realize the relation between the sales orders with the Service Notification, i have looked for the transaction VA02, but i dont find where can i enter the service notification number, and i have looked for the transaction IQS2 but i dont find where can i enter the Service Notification Number, we use the transaction IQS1/S2, we dont use the transactions IW51, IW23

Thanks