When the capture is initially configured, all of the locations will be populated from the CSV. If there is a need to add a new location to the capture after this initial set-up, you can navigate to the 'Captures' page and select the capture by clicking on the 'View' button.
Once on the capture page, hover the mouse over the three dots in the top right-hand side of the screen and click on the 'Add Survey' button. Once the contact and location has been assigned, you will be able to add this as a new survey by clicking on the 'Create' button at the bottom of the page.