How does the belt go on around the pulleys?

the idler arm has a white wheel. the belt sits on the wheel (both sides). Push down on the the wheel / arm and the belt should now go around the motor pulley. groove side of the belt is against the drum. So it should look like this, if your looking at it from back right side of unit, left side of belt against white wheel, press down and fit the loop around the motor pulley. Good luck!