How do I convert baking time for a 9" pumpkin cheesecake (1 hr and 15 min) to 12 mini cheesecake molds

I'm certainly not a pro, but I just made 12 mini cheesecakes in that Williams Sonoma pan and they cooked in 20 minutes. You know the pan with the removable disc in the bottom.

I imagine it would be significantly shorter, but let's allow for a few pros to weigh in ...