Change the value of an extension in master agreement via script.

Hello.

I'm trying to change the value of an extension in master agreement via script.

As I was checking, I couldn't find a function that would help you on that matter.

Is there a way to do so?

Example.

I added an extension in MA header, of a value, let's call the value "RFID".

If I want to change that value automatically via script when the MA loads. What function would allow me to set the new value of the RFID field, given it is an extension field?

Thanks in advance!