Is is possible to load data directly onto the flexfield attributes used on BAI2 ?

Summary:

We used to have one configuration on R12 where when loading a BAI2 file, we had mapping rules on a whole transaction line. On Oracle Cloud, the same line is split into multiple field (In my case, Account Servicer Reference, Customer Reference and Additionnal Information) and we can only do rules for one field at the time and not based on multiple field.

On Note ID 2237898.1, Oracle says a dev should develop a shell script for combining these information.

Can you enlignthen me on how this script could be applied to the flexfield xyz and then we could use this FF for our seach string?