It is within the Google Now functions. If you open up google now or say "OK Google" and scroll to the bottom of all of your cards, you can find the settings. Open up the settings, find my stuff, and then reminders.
I'm sure there is an easier way to tap into them, but I haven't messed around with it enough to know yet.
I don't see Google Now in myapps or settings. when I say okay Google I don't see any cards. And when I scroll to the bottom & press the 3 dot button to access "Settings" I don't see anything intuitive there either. ???