Hi,
May the confusion is which exit was used for Screen enhancement. I was guessing IWO10018 was used for the screen enhancement where we could have been able to set the default Values. The mention of the include ZXWOCU07 confused me .
I don't have any applied method which I have used in the past, I would have given it a try and used IWO10018 exit to set the default value.
Sorry for the confusion.
Hope this helps.