Looking to send theremin audio signal out to guitar amp

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So I'm a student at Cal Poly Pomona and I am a complete newbie to wiring up a bread board. I've spent the last few hours watching tutorials on how to wire them up. For a midterm I have to build a theremin based off of this wiring diagram:

I do wiring on my own guitars so I'm somewhat familiar with simple circuits and what not. I want to replace the volume button on the bread board for a 10k potentiometer and I wanted to see if it was possible to substitute the speaker on the wiring diagram for a female 1/4" adapter like this

so I could plug in a male to male 1/4" instrument cable out to a guitar amplifier. I was imagining that instead of the positive lead and ground going to the speaker it would just be substituted for the positive and ground on the jack? I read another post on here that was similar to this and it mentioned including certain resistors and capacitors in the circuit to tame the signal and thats where it lost me. I understand why the capacitors are there just not sure where they belong in terms of the path of the circuitry on the breadboard.

The last post in that thread mentioned a signal path which is: Output -> 10K resistor -> capacitor & 1K resistor -> arduino & audio ground. If this is what I should be doing I am having trouble visualizing this. Lets say if I were to implement this into the wiring diagram I first posted, then the wire coming from the arduino pin 10 would need a 1k resistor (lets say its the one connecting C24 and C28) but I would move it over to column B, then the capacitor would be connecting C24/28 now and then the 10k resistor in D24/28 and then connecting the positive from the output jack in E24 essentially finishing off the rest of the diagram as is? heres how I'm imagining it, picture the green wire coming from the arduino board and the red going to the output jack and the resistors/capacitor are in a horizontal circuit next to one another. (I know the resistors aren't the correct ones these are just for the visuals)

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or would it be something like this where the resistors/capacitor are going down the bread board forming a vertical linear circuit. like this

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I hope that made sense, I find this stuff extremely fascinating so I am doing my best to grasp these new concepts. Any help is appreciated!

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Terratony93:
The last post in that thread mentioned a signal path which is: Output -> 10K resistor -> capacitor & 1K resistor -> arduino & audio ground.

I think it should read like this:
Arduino out -> 10k -> cap -> output, and 1k from output to ground, both grounds connected. The resistor values may vary, depending on your guitar amplifier sensitivity.

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