Hello, Does the nav speed lock override kit they are selling here require soldering at all or is it all plug and play? It seems that prestigious society is all plug and play but this is a heck of a lot cheaper so wanted to figure out if this kit requires any soldering. Also does anyone have instructions. I searched on priuschat and found it but everytime i clicked on it, it brought me back to the main page of priuschat for some odd reason. Any help would be greatly appreciated.