Translation
If he covers the left side, then take his left hand with your left hand, with all the pommel of his sword, and hang it before you and with thrusts and cuts, you can hurt him well.
Interpretation
A technically simple play, the 10th scholar has a lot in common with the many examples of elbow pushes which can be found thoughout the Fior di Battaglia. Mechanically very similar, it relies more on timing than anything else.
The set up for this play is the 3rd master of the sword in two hands, with both combatants in a moment of balance. You both have your right foot forward and the swords are crossed in the middle.
As your opponent rechambers their weapon to their left shoulder, step through with your left foot. Your foot wants to move at the same speed as their hand. Grab the base of their left hand as well as the pommel with your left hand, catching their momentum and overexaggerating their motion. Push up and forward as you step. Your right hand stays more or less in the same position in space and you step past it. Drop the point, keeping your arm tight against your body. You want a straight line from your hip, along the axis of the sword to your opponent. You will find yourself as pictured.
Your opponent is initially wide open to a sottano stab straight into the solar plexus. After that, they will be incapable of much further action. Be aware that to prevent them making one last counter strike before collapsing, the softness of the abdomen means you can pull the blade back out without it catching on any bony structures. Continue the attack while still jamming their weapon.