Mapping of Third-Party Tax Registration Number column in Order Management Extensions Fields

Summary:

I have a requirement to map Registration Number present at Customer Site to Sales Order Line's Tax Determinants field named as "Third-Party Tax Registration Number" whenever a Sales Order is getting created. To achieve this, I am using Groovy script in Order Management Extension.

I am not able to find either ThirdpartyTaxRegistration OR ThirdpartyTaxRegistrationNumber in Order Lines VO to update. Although, I checked that this field is not getting stored in DOO_LINES_ALL table, it is getting stored in DOO_FULFILL_LINES_ALL.THIRD_PTY_REG_ID column.

Request you to let me know what can be the correct Extension's column mapped at line level to update Third-Party Tax Registration Number.