If there has been a saving, is the Project Manager’s assessment of the Contractor’s share added to the amount due on termination?

If there has been a saving, is the Project Manager’s assessment of the Contractor’s share added to the amount due on termination?

Yes. The Project Manager’s assessment of the Contractor’s share is added to the amount due to the Contractor on termination if there has been a saving (see Clause 93.6).