If your circuit board has been completed without adding a chip, I suggest you make a new one. This kind of chip generally needs heat dissipation, and the problem can be solved by using heat sink. There are two speakers, one is the ground wire and the other is the music signal. You can buy a solderable earphone jack and solder it on the circuit board. Watch the needle. The pillar in the middle of the earphone is the audio signal, and the surrounding metal is the ground wire. Be careful, just don't connect it wrong.