This is covered starting at about 2:18 in the video. In this example, the "D" shaped handle/lock is turned into the "lock" position. In this position, the handle/lock drops down into the plate that wraps around the ball, and then is secured in place by slightly turning the lock/handle. You do the reverse to un-secure/lock the hitch. Each system might be slightly different. Therefore, we encourage you to seek a local expert to ensure you are properly securing your trailer hitch on the truck ball.
How do you lock the hitch onto the ball?
This is covered starting at about 2:18 in the video. In this example, the "D" shaped handle/lock is turned into the "lock" position. In this position, the handle/lock drops down into the plate that wraps around the ball, and then is secured in place by slightly turning the lock/handle. You do the reverse to un-secure/lock the hitch. Each system might be slightly different. Therefore, we encourage you to seek a local expert to ensure you are properly securing your trailer hitch on the truck ball.