How to turn on small 3.5v motor using a Pyro electric sensor

So the idea is that when the sensor is activated through motion, a motor will start to spin and speakers will play music.

The Diagram is a older version and i have now replaced the photodiode/led emitter with a pir pyroelectric sensor.

I have a basic block diagram of all the components needed to make the circuit work, i just don't know how to put it all together (wiring all the connections on a breadboard)

There are two PCB mounted stereo jacks. One connects to the mp3 through a double male 3.5mm jack, the other connects to a speaker. The two PCBs are connected by soldering on the top I presume?

Can someone show me how to connect everything? PS. I am new to arduinos and not very good electrical circuits (Cant understand them) can someone show me a diagram to show how i connect what where?

Thanks.

B3 - How it Works Circuit - Copy.jpg