Until you have values in both fields, the key field in each table, there is no link between the two records that can be used to look up the value from the first table's current record.
You can use this script to create a new record on the second layout that's linked to the current record on the first layout. Since I don't know the names of your tables, layouts and fields, you'll have to modify this script to match what you have in your database:
Set Variable [$ID ; value: Orgainization::ID ]
Go To Layout [Contacts]
Set Field [Contacts::ID ; $ID ]