With the pads facing outwards sit down in the machine and have the inside of your thighs touching the padding. Adjust the pads so that your legs are spread apart from one another as far as comfortable where you may feel a mild stretch in your inner thighs. Your feet should be flat on the platforms and have a straight back against the seating.
Start by slowly contracting your legs to be as straight as possible without touching one another. Then in a controlled manner retract back to just before the starting point to maintain tension. Focus on pushing from your knees. Repeat for the desired amount of repetitions then gently rest the weights.
Avoid the use of momentum or clanking the weights when finishing a repetition.