Look lets not complicate things. Two hides just big enough for the snake to snuggle up in.
You need a hide on the warm and the cool side. If you are using a rack system then you can use one.
If you are just starting with snakes follow the care sheet to the T. There are people on here with excellent opinions. I will be using one hide in my rack system but I actually have 3 in my cage and I am adding a fourth.