The mini amps either have an RCA or 3.5mm input on the back left side. The other connections on the back right are the pair of 5 way binding post speaker wire outputs!
A stereo receiver adds multiple RCA inputs.
Learning to strip speaker wire is easy. Even easier with a wire stripping tool . A spool of wire lets you cut the size you need.
Or cables with banana plugs are an option, stick them straight into the front center of the 5 way binding posts, on some speakers or amps you may need to pop the tiny caps off the end hole of the binding posts first.
Measure with some string first to find out how much you need to go down from the amp, across the floor to the speaker stands and up to the speakers so you are not suspension bridging the cables in mid air. https://www.elac.com/speaker-placement-guide-get-the-best-sound-from-your-stereo/
Speakers that connect with RCA connection would be powered speakers with a built in speaker amp and they still have 1 set of speaker wire to connect one speaker to the other, a short 5 to 10 ft wire is usually included and already stripped.