I need to be extremely close to the garage door in order for the opener to work from the car and I suspect this is the reason that auto opening does not work for me. I'm looking into options for increasing the range. I have an older Chamberlain Garage door opener and I see a small cable hanging from it, which I assume to be the antenna. What's the best way to extend this so it works with the Model S garage door opener? is it as simple as getting wire of a certain gauge and splicing it with the little wire hanging from the opener putting a wire nut in there and bringing that wire outside the garage door by a few feet? Would be great to get this to work so as I pull up to the driveway, the garage door is already open.