Be smart, go with SLP. They are the only company that has worked with Polaris with the new fix as far as I know. With a lot of uncertainty with the updates, SLP is a safe bet for a performance bolt on, you will get some improvement over stock and you can trust the manufacturer on this one...
Most polaris sleds have an accessory wire set close to the ignition wires right by the key. Look by the plastic, if that is the one you are talking about it is a popular location for an electric shield plug. Best thing to do is check it for current and go from there. I used mine for EGT gauges...