COOPA003 Enter user-defined master data fields

The data for orders is stored in database tables that are defined by SAP. Using this enhancement, you can include user-defined fields in the table of orders (table AUFK). For the new fields, you can use the same functionality as for working with the master data fields delivered by SAP.

COOPA002 Customer function in internal order master data maintenance
This enhancement is superseded by the enhancement COOPA003, described above. You can continue to use COOPA002; however, SAP recommends you to use COOPA003.
In internal order master data maintenance, you can use a function code reserved for customers to process your own screens - for example: to maintain additional data for orders.
You can create your own tables or change data fields in your own name ranges. You can maintain user-defined menu entries and make the access to functions possible from master data maintenance.

Я знаю про COOPA003, знаю только через include CI_AUFK добавить поля, а как из пользовательской таблицы не знаю, можно где-то посмотреть как это делается