I'd wait for th official translation, cause this does not make one bit of sense. That would mean that a) Kinemon or whoever lied back then, when he said, that Enma draws out the user's haki and b) that Enma somehow has an infinite haki pool within it, that can be used as much as you like, if you just have mastered to control it. - lol NO. That's just non sense.
It's just that Zoro can choose to let Enma go wild and with that he just told us, that he has to let it go further than he did there in order to damage Kaido significantly.
It's just that Zoro can choose to let Enma go wild and with that he just told us, that he has to let it go further than he did there in order to damage Kaido significantly.