The Forward Lateral Triangle sets the swing in motion. As the torso begins rotation, the "Y" Triangle will move, initiating the Forward Lateral Triangle.
At this time, the triangle members (shoulder, knee and wrist) move in unison.
Once the backswing engages and the force pulls the club along the target line, you apply a light, opposing force to the backward movement of the swing.
This will control the takeaway in a slow, controlled movement.
Since the club rotates away from the target, a slight force applied toward the target will help control the speed of the takeaway and the precision of the swing plane.