By default, when a client makes a booking at a specific location, they are automatically associated with that location. However, if a client visits multiple locations, you can easily add them to additional ones.
Go to Clients
Select the relevant client to open their profile
Scroll to Locations at the bottom of the page
Click in the location field
Choose the additional location from the drop - down
Click Save
Once added, the client will appear under each of the selected locations.