While installing my EcoFlow alternator charger I came across these wires under the rear seat. I do not have the extra aux switches so I really have no what they are stubbed out for.
They are to connect a trailer brake controller
Read through this thread; and specifically this post if you're going to be adding oneNice! Have you done this yourself? Or know of someone who has? I was debating just getting an Echo, but have had nothing but Bluetooth connectivity issues with it and would prefer a physical lever.