append to existing field

Good day everybody
I need some help with a append query please. I ran a query to concacenate the title, initial and surname fields in a table for printing purposes. now i want to run a uppend query to a new field named concac in that same table with the information comming from the query.
the append query ads the records as new records, i want it to ad the information to the existing record in the new field that i have created

Please help
Thanks