Simulink and Arduino - Simulink not reading data from Arduino pins?

I have a simple model where all I have is jumper cable connected between 5V and pin 8.
My goal is to simply use simulink to read the data at pin 9 which should be 5v but all I'm getting is 0. The simulink model is as shown
model_test
And I've tried collecting data from a variety of different basic systems, i.e button presses, pwms but all I get is 0. What do I do? I'm using external mode; fixed-step and discrete in the model and hardware settings.

Arduino model is as shown

Why do you think that?

because it's connected to 5v power rail? Or i guess it should be a logic 1, but whatever the case simulink shouldn't be giving me a 0

Did you read what you wrote?

all I have is jumper cable connected between 5V and pin 8.
My goal is to simply use simulink to read the data at pin 9 which should be 5v

Again, why should pin 9 be 5V?

Typo when writing, pin 8 should be anything but 0.

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