Adjust both cables to be at shoulder height and hold both handles so that your palms are facing downwards. Step forward to keep one leg in front of the other for stability and start with your hands in line with the front of your mid-chest.
Push your hands straight forward until your elbows are almost fully extended, then slowly retract back the same path to the starting position. Your elbows should be flared out at roughly 45 degrees throughout. Keep your wrists aligned with your forearms. Your hand's path should remain aligned with the elbows. Brace your core to keep a straight back throughout. Repeat for the desired amount of repetitions.
Avoid having your elbows positioned up in line with your shoulders or using excessive momentum.