Amp with speaker INPUTS?? Please explain!


So, I was browsing an amplifier manual, as one does, and the diagram shows four spring clips (R+ R- L+ L-) labeled Speaker IN. (I couldn’t figure out the image hosting thing, otherwise I’d post pics. It’s an AudioSource Amp 300, and the manual is short and easy to find.) I’m not familiar with component connections beyond a couple pairs of speakers and maybe an EQ. But this puzzles me. Can someone please explain when you’d use this? The short “explanation” In the manual is woefully inadequate. 
 

I’m especially interested to know if speakers are at the other end of the wires that connect here. I mean, that would make no sense since speakers don’t send anything that direction, right? 

bricago

I can tell you one thing, I'll never offer you any assistance.  And, you were being rude.

That’s fair. But I won’t reciprocate. I’ll be happy to send you Google’s answers to your questions. 

If you're so good with Google, why did you ask the question that you did?  You professed to know nothing about the speaker input function.  I provided that answer.

Nobody on this forum owes you one minute of their time.  You act like you are owed a detailed explanation.  

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Er-Body messes up now then.  Including myself putting my foot in my mouth.  There's enough junk in the wild to deal with these days.  Let's at least give each other a break.  Have I told yall I don't know a single audiophile in my area?  Does anybody live in the Salisbury, NC area.  You might be my neighbor!  lol  Does Cheerwine mean anything to anyone?