Linearize Simulink model simultaneously on signal with multiple channels

I want to linearize a Simulink model for a given input and a given output from MATLAB script, using linearize and linio command.

The output of the ABCD model should be located into a single signal with size of 54 (mux of 54 channels into one single channel).

How can I get the 54 outputs of the ABCD model on all the 54 channels (i.e. settings of linio)?

Is it possible to specify the output of all the 54 channels toghedar or I need to set one-by-one all the 54 chennels as single outputs (e.g. using a demux)?