The origin of the distance

Hi!
We have several warehouses in different cities where delivery is made, but the plugin counts the distance from the default address. You can make the distance count from the address that will be specified in the delivery option settings. For example, I create several delivery options: delivery in Milan, delivery in Paris, delivery in Brussels. There are different distances for all cities. It would be great not to set the default address, but to allow the store owner to specify the distance reference points for each delivery method separately.