How to create sales order with service request in Orchestrator?

Hey Guys,

I'm creating a service request to enter multiple lines in sales order. The standard process to do this is as follows:

Open P4210 application > Click Add > Enter "From Branch Plant" and "To Branch Plant", then in grid data > Enter "Quantity Ordered" and "Item Number" details and tab out, then go on adding lines as per requirement.

I've spent quite a few hours on this, but haven't been able to figure out how to achieve entering multiple lines through orchestrator.

I even used process recorder but it records only the first entry, not multiple lines. I have a feeling that it might be related to passing an array or something, but can't really find solution to this!!!