Short answer
HubSpot's KB: configure the NetSuite sales order to HubSpot order sync first, or no HubSpot order is created. Include every field NetSuite requires; the KB suggests creating an order in NetSuite to see them. Pick the account and subsidiary.
1. In HubSpot
The relevant screen in my demo portal.

2. Worth knowing
Test with one deal before automating.
3. Related
NetSuite integration and the sync card.