dealer installed the speakers so i cant answer that. the cup holder drains into hull from there so i assume they fished it through there.
I have the sonic hub that connects to my lowrance. I control the raido from my lowrance. I have a USB with all my music plugged into the sonic hub. I also can connect my phone bluetooth to the sonic hub. sonic hub is amped but wasnt enough so i put the jbl amp inline with the hub and speakers.
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