Are you just trying to copy and paste it? You should be able to copy the connection string and the query from QlikView 11.20 to the Sense Data load editor. It would look basically like the Qlikview 11.20 script.
I have a SQL database and a query with the SELECT, FROM, WHERE... I just want to copy that from the SQL editor and paste it into Data Load Editor in Qlik Sense. If I use Qlik Sense select tables from the db, I get all the fields and I don't want hundreds of fields in the load statement.