Hadaka jime. OK.
1. Throw your opponent in such a way that you are behind him.
2. Wrap your right hand around his neck from behind, so that your right elbow is directly under his chin.
3. grab your own left hand using your right hand, very tightly, then pull the opponent's head towards your own head (the back of his neck should be on your chest). While doing this, make sure your right bicep and your right forearms are digging into the veins at the sides of his neck. This is the blood-constriction move (legal in Judo).
4. If possible, wrap your legs around his waist too for extra leverage.
If my explanations are unclear, then please forgive me because English is not my 1st language. I will post pictures if possible.