Step 6: Connect the Receiver to the Recording Module
The negative speaker wire will be used to connect the receiver output transistor to the play pin on the recording module. One end of the wire is already connected to the output transistor. So we just need to connect the free end to one of the play pin holes that were mentioned in Step 2. You don't need to solder the wire to the recording module. You can make a good connection by just twisting the wires together around the board. To do this, Insert a few strands of the wire through one of the holes (the hole is probably too small to fit the whole wire). Then twist the strands of wire back together. As long as wires are tight, it should make a good connection and stay in place.