All the sources, turntable, CD player and tape unit have an output. These should go in the input of the amplifier with the same name. Then only the Tape player, could have an input, for recording music or whatever. For that input, your amplifier should have an tape out. All these should be connected with cables with tulip plugs, like these.
Use the white for left on everything and red for right.
If one of the devices as a different connector, find a cable for audio, with on one end the tulip plugs and on the other end the fitting plug.
Then the output of the power amplifier it should say output or LS, can be connected with 2 wires going to the speakers.
For this the same counts, although it is difficult to see when you use electrical wires in one colour. What comes out red on he amp, should go on the same screw connector on the speaker. Just to avoid one speaker being out of phase. It will work, but could sound a little strange when the speakers are out of phase.
With the correct model names added, perhaps we could have given a more accurate answer.
Please don't test the system or switch on, with the volume button to the max. Don't switch anything on an amplifier when the volume is high, or the setting is high. A short increase of the volume, during switching can, and has very often destroy(ed) the speakers.