Add reference to player constant

docs/perception.rst

@@ -29,7 +29,7 @@ BaseLocationManager
    .. attribute:: library.BaseLocationManager.starting_base_locations
 
       A list of all :class:`library.BaseLocation` on the current map which a player
-      started at, indexed by Player constant
+      started at, indexed by Player constant (see :ref:`playerconstants`).
 
    .. automethod:: library.BaseLocationManager.get_occupied_base_locations