I have a few minutes while the kids are busy...
I'll apologize for the lack of a proper translation, such as it was, but i had a sword and not a pen
When you approach in at the onset and your opponent strikes an unterhau to your left side, fall on it with the long edge. Release your pommel and with your left hand, inverted, grasp your opponents handle between his hands (also grab your blade). In the same motion invert your right hand, grabbing your opponent's blade.
Here's where we get fuzzy (er) There's something about removing the sword from your opponent's hands and then cut him above or below. As I said, the guys working on the translation were missing a bunch of key stuff.
It felt rather awkward, especially inverting the right hand in the same motion as grabbing with the inverted left. If you don't at least loosen your grip with the right, you end up trapping your fingers. Assuming you grab your blade when you grab your opponent's handle you also trap his fingers, quite painfully when you're not wearing gloves
Inverting the right gets me. It doesn't feel like a powerful position. If you don't invert it you have good leverage to cut your opponent in the head with his tip (from your right), or cut him with your tip low from your left.
I was trying to do a transcription, but I'm not the best with this stuff and having a 14 month old trying to climb on you destroys any effort to concentrate!