Breeding Firebelly Tank

I am attempting to breed 3 Firebelly Toads in this tank. 2 of them take turns croaking and grasping onto the hind legs of the larger one, female hopefully. There is a hill on the left so there can be a shallow area and then there is a hill in the back against the wall. It is raised with brown edging and there is shelter underneath for the babies and to hide from the light if it gets to warm. I hope I am doing this right if anyone has tips I will gladly take them.