My interpretation is, the power light is on whenever power is availble to a component or system with a physical actuator, such as a drive motor or a pnuematic valve. For example, Cayenne has the removeable links between all the power systems and battery negative, so I would connect the power light between battery positive and the side of the link not connected to battery negative.

The failsafe light is on when no valid signal is received from a transmitter.

Is this correct?