Hip control is one of the most important components of the Knee Cut Passing.
You need to beat your partner's hips with your hips, which often results in controlling (pinning) your partner's hips.
Even though your partner's shoulders are far away, it's essential to make sure they are flat on the ground, just like their hips. Any movement of the shoulder will introduce opportunities for less control and the possibility of escape for your partner.
Head often initiates the movement of the body, which means any head turns towards you will open your partner's body to begin the escape routes.