RNN Feed Forward Doubt

In the figure below we see the standard many-to-many RNN. In the figure, I am unclear what the neurons inside the rectangle represent, as in according to the equations it seems that only one neuron exists which carries out yhat1=g(Waa a<0> + Wax X<1>+ba) , how are those neurons in the box connected.

That notation is discussed in one of the lectures.

@TMosh I went through the lectures again, and I think I got it, thanks