Ground Loop Issue when connecting AUX Cable

[AgentDave7]

Since I wasn't able to solder the audio component, I have to get audio through an AUX cable.
However, with the addition of the 2 wires to allow for USB-C charging, there is a constant and irritating buzzing noise.

Is the best solution for my situation to unsolder the 2 wires and then make sure my 3DS is plugged in while in use?

[loopy]

Either that or get a ground loop isolator.
Something like this.