At the ceiling box - The black wire from the switch connects to the ungrounded fixture conductors {aka hots} for both the fan and the lights. The white wire from the switch is the grounded leg {aka neutral} for both the fan and the lights.
Bare wires are together and grounded to box and if the fixture has a green wire or a grounding screw , it gets grounded also. Bares and green wires are equipment grounding conductors.
Be sure to read all documentation that comes with your fan / light combo fixture.
If only switched power required onward then at existing fixture
This is not possible with this configuration as there is no unswitched ungrounded conductor {aka hot} available at the fixture location.
NOTE: At switch one - only unswitched power is available to be continued onward. At switch two - only switched power is available to be continued onward.
If only switched power required onward then at existing switch (AT SWITCH 2 ONLY)
If only unswitched power required onward then at existing switch (AT SWITCH 1 ONLY)
If switched and unswitched power required onward then at existing
switch
This is not possible with this configuration as switched and unswitched
power are not available at the same switch location.
The common screw of a 3 way switch is the Odd color screw
If wiring multiple fixtures be sure to check the following guidelines concerning how to do it and what not to do: Wiring Multiple Fixtures.
If you are new at understanding the "politically correct" electrical terminology and need clarification of the terms used, we strongly urge you to read the Clarification of Definitions and Terminology guide. This will explain the terminology used in this article.