Update: I managed to add the extension cable to my helmet wiring and while it did improve the reception, it's still not like it was with the Sena wiring, so these speaker wires must somehow be different

Now, they do include about a 2' extension cable with the speakers, so I inserted that between the plug and the Sena and it improved the reception, but the extension is way too long to try to fit it all inside the helmet

I attempted to run the right side wire over the top of my head (a tip from Revzilla to improve reception) but it was a tight stretch with no slack at all, and would probably cause a wire break over time

I just know that the stock wires as well as my ear bud wires gave me great reception