Find Item Preferred Stock Level for SCM Mobile field

I have a requirement form a customer who want to display the Preferred Stock level of an item on a SCM Mobile Page.

I know I can use a dynamic field to hold information returned from a record by using the following string, as an example, in the message field.

{{record:inventoryitem:{{state:dataRecord:scriptParams:itemInternalId}}-upccode}}

Where

• {{record:inventoryitem identifies the record to be searched
• {{state:dataRecord:scriptParams:itemInternalId}} returned the value stored in itemInternalId which is the Items Internal Id
• upccode}} is the field to look up.

But in this case the preferred stock level field is stored in the location configuration record. How do I get to that field?