Now the elephant in the room is how exactly do I accomplish this feeling? I am going to zero in on the word "confined" specifically how it relates to space and using space to create the tension I seek. 

For this I need to take a look at how a scene create tension through space and the best place to look for that is film where that is a key component of everything.

"One of the classic ways to build tension in a scene is to simply show the audience something moving in the background. With this technique, you can provide the viewers with information that the protagonist doesn’t have. It’s a quick way to ratchet up the tension, giving the audience a loss of control feeling. All they can do is watch helplessly as a character wanders into a dangerous situation."  (Boone, 2021) 

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Quite honestly, I don't think this quote is particularly what I am looking for. Although I do see the advice to be solid my scene is going to be static thus this does not apply to what I am doing.

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"Blurred background objects always increase the scare factor.

While having things creep around in the background is scary, it’s even scarier when you can’t clearly see what’s doing the creeping. Hide something or someone in-frame by using a shallow depth of field.

Decreasing the depth of field will help blur out the foreground and background, allowing your monster to perfectly disguise itself from the viewers. Seriously dude, turn around."  (Boone, 2021) 

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Now the quote here is definitely more applicable to what I want. While I still don't want moving objects, blurry, obscured objects is certainly a possibility.​​

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On this basis I feel like a great way to build tension further would a constricting area that feels tight, that adds to making everything feel uncomfortable and obscured I believe.