To Add or Edit locations in a calendar follow these steps:
*you must be in edit mode
Click on the Pencil to drop down a menu and select edit locations
Give the location a title
Use google Maps to find the location and copy the map link in "map url" field
To remove a location simply click the trash can icon next to it
To edit a location click on the name and it will reappear in the fields to edit.
Click "Update" to save changes