You will need to download the App ''RPM Speed & Wow'' which you will need to set the correct speed.
Photo 2 shows your which opening you need. You will also need a small - (flat) screw turner.
You may place the record player as you can see in picture 3 & 4
Then you may place the phone with the app on the record player.
You can then turn with the screwdriver ( don't press too hard , but you will notice it is in the screw if you feel a little spring resistance) until you find the Right RPM speed.