If you connect the wires without soldering it can loose for some time, that can cause the motor not to properly work, that's why it is advisable to solder it.
hi, for the motor there's no indicator for the polarity, based on my experience in terms of soldering the wires to the motors, if you solder red wire in the right side and black wire in the left you must do the same thing for the other motors, so it will be the same rotation when you placed the motors and test it. kindly check my other video ru-vid.com/video/%D0%B2%D0%B8%D0%B4%D0%B5%D0%BE-L1Yvs3njrAc.html how to connect with L298n motor driver
@@JRECT thanks for the motors and bro I have made a radar project it consists of The servo,Arduino Uno, breadboard,some jumper wires MM and MF jumper wires and sonar sensor so I did all of it and the servo was spinning with the sonar sensor but it wasn't detecting the object Which came Infront of it I also installed the Processing 3 software but the readings were stuck on 1 place please help me