IMPORTANT: This step is sensitive and if done wrong, the threads on the pedal or the crank might get stripped. You should tighten the pedals by hand as much as possible and then fully tighten them by using a wrench.
IMPORTANT: Please ensure the pedals are fully tightened otherwise pedals can gradually get loosen and strip the crank arm threads.
Tighten the right pedal to the right crank by turning it clock wise by hand (photo 1). You should be able to tighten the pedal almost all the way down by your hand.
Tighten the left pedal to the left crank by turning it anti-clockwise by hand. You should be able to tighten the pedal almost all the way down by your hand.
Tighten both pedals fully by using a wrench. Please ensure both pedals are fully tightened.