Word merge letters - Search parameter default source

I have modified the Main Tables, Search and Report Fields parameters in Report Specs for a Word letter.

When a user wants to copy and modify this letter, they do "Save As" within the iMIS letter system. When iMIS creates the new entry in Report_Desc then it takes the Main Tables information from the letter being copied. However, it takes the Search and Report Fields information from elsewhere in iMIS.

I have found where the Report Fields value comes from; it is in System_Params where ParameterName = 'FR_Control.WordMergeFields' (FR for fundraising).

However, I cannot tack down where the Search value is being pulled from.

Can anyone point me in the right direction?  I'm asking Tech Support too.

Thanks

Conrad