It’s not exactly a one-to-one relationship. Each location can have multiple device configurations, but each device configuration can only point to one location.
You can quickly change locations by printing a barcode from the WMS Express Device Configuration card. When you’re in the card you can click on Reports > Print Configuration Barcode. Make sure you select the location you want under the “Filter: WMS Express Device Configuration” section, and deselect the “Use Additional Insight Works User Logins” toggle if you are not using Insight Works Users. You can scan this barcode from the home screen in the WMS Express app to quickly change locations.