[Gundam eyes him for a moment, as if sizing up the sincerity of his promise. But he nods and unfolds his arm, raising up the unbandaged one.]

The space in front of your collar. Tap there three times with your finger or thumb. Make sure it is a firm enough tap to make a sound.

[To demonstrate, he uses his thumb to tap on his own shoulder, so Kuzuryuu can see how to do it.]