JDMAP1

My dumb a$$ didn't realize to set the cars menu in to "replacing pads" when I tried after taking everything off, I accidentally engaged the E brake and that pushed the both piston out. And now the car menu won't even allow me to put it in "replacing pads" mode. I have both calipers off the car...has anyone had experience/tips on how to reinsert the pistons back in?