First off, the term steering lock is somewhat incorrect, and that’s because a motorcycle isn’t equipped with a steering wheel. In fact, what this type of denomination usually refers to is a handlebar lock.
With such a product, you first need to turn your bars to the right and then push in on the key so as to engage the lock into the hole in the steering stem. To lock it, all you have to do is turn it. Try to move the bars slightly to the left to get some engagement. Don’t forget to take the keys out of the lock.