You have to install driving wheel before installing belt, tighten screw lock on side at 1 to 2 mm from bottom.
Then there are 45 and 33 rotate speed above, install according to actual requirement.
After installing belt, you can install your singing arm and complete the installation of your turntable.
Note:
Selecting a phonograph belt requires attention to size and thickness of straps and improper sizes and thicknesses will cause straps too tight or loose.
Too tight belts will carry motor vibrations on turntable resulting in worse tone.