Regarding the battery cable locations... READ RULE #1 which asks that you read the manual from cover to cover. You'll see answers to more than you realize you didn't know.
Second, stop the habit of even touching the brake. Just simply quit doing it...
Thirdly; shifting too early is causing you to not get the most of your machine -- and as mentioned, potential trouble down the road later when a few things start to wear out from the added stress you are causing from loading the engine too much. Spyders thrive at higher RPM's, and their power-curve is at the high-end of the RPM spectrum. Running one at low RPM's results in the lack of horsepower/torque; a rough running motor, and rougher shifting. Again... try using the "trailer-mode"... it will not let you shift out of first-gear until you are at about 28 MPH. That will show you how high the engineers designed the RPM's to go. Something to think about.
Overall.. it appears there are several problems that are caused by the riders rather than the machine. Learn to follow the suggestions and you'll soon be enjoying your Spyder a whole lot more. And remember the rule to "Have Fun!"