What you did should work. I will usually solder the ends to prevent misc strands reach over and shorting the amp.
So, what to do?
Verify both clips on the receiver have clipped down on their perspective wire and no strands are touching the back panel or opposite terminal.
Do you have any other wire you can use to verify the receiver to speaker connection works.
If another wire will not work, then you probably accidentally shorted out the amp in the receiver. Look for a fuse on the back of the receiver… usually brown cylindrical protuberance. Turn counterclockwise while pushing in to release. Is the filament broken? If so, go find a new fuse.