How to add different Inputs into different layers in ANN model

Hi there,

I want to make an ANN model with 2 hidden layers, (5 hidden nodes in each layer). I want to have 3 input for my first layer (tOut,tRet,Sodamp) and then one external input (Scc) for my 2nd layer. I wrote the code below for the first layer but I do not know how to add the Scc input to my second layer. Does anyone know the answer?

hiddenNodes = [5 5];

net = fitnet(hiddenNodes)

view(net);

x = [tOut,tRet,Sodamp]';

y = tMix';

[net,tr] = train(net,x,y);