It was word for word. Doesn’t mean that it wasn’t good information. You said that you didn’t know what the speaker inputs were for and my post answered your question. I didn’t figure that I could say it any better than Google did.
If you use the speaker inputs on the AudioSource, you would connect the speaker outputs from a receiver (the terminals normally used to connect the receiver to the speakers) to the speaker inputs on the AudioSource. This is an amplified signal not typically used to connect to another amplifier.
When I first read about the AudioSource, I figured that it was a feature used to boost wattage from a low wattage receiver. As Eric mentioned, there was a time when watts was king. I think it was a bigger priority than sound quality. I lived through those days....