hi try to see if you can use
GET DQUERY DEFINITIONS METHOD of your search view class. if you observer, all RT_RESULT will hold all search parameters.
there is field called SERVER EVENT, you can given any server event here and try to create new event in your view with the same name.
triggering F4 help should trigger this event. in this event you can read the selected value of sales org and control the value in the service org.
you can observe any search button event handlers in any component to see how read/add parameters to the search screen.
let me know if you need more help.