Hide activities 4-6 in prod.ord confirmation

Hello,

In addittion to the activities we use today, in the work center, we want to use activities 4-6 during production order confirmation.

We don't want the user to see it, we will update these activities via BAPI.

I tried to hide all the relevant fields for these activities, through CO86, but found only ILE04-6, ISM04-6, LEK04-6.

The problem is that I still see activities description (TEXT4-6), confirmed activity (RUM04-6), planned activity (SLM04-6), etc..

Maybe someone knows how to hide these fields also?

Thanks a lot,

Yael.