Complex sentence: On some modern game controllers, the position of the first stick is where the left thumb usually rests, usually to the upper left of the D-pad while the right stick is usually to the lower left of the face buttons.
Split into simpler sentences: On some modern game controllers, the position of the first stick is where the left thumb usually rests, usually to the upper left of the D-pad. The position of the right stick is usually to the lower left of the face buttons.