How do I get a service location on the work orders?

While creating work orders, the field service location auto-populates the customer's "Business Location" value. So, before selecting a particular customer, ensure that whether the customer has any value in the address information field, as it will get displayed as the service location address in the "Service Location" dropdown.

If your customer has both billing and shipping address information, then both addresses are displayed in the "Service Location" dropdown. Once you select any of the addresses, it will display in the "Address" field.

For instance: The customer's address information with the business location is as shown in the image below:

Here, the customer has both billing and shipping address. You can view both the addresses in "Service Location" dropdown while creating or editing a Work Order.