Can anyone tell me how and where to fix the converters / diffusers on the Headlamps of the New Gen3 Prius for use in Europe? I have the normal Halogen H11 headlamps and will buy Eurolight diffusers to fix on. With my previous Gen 2 Prius Toyota supplied a Tenplate showing the size and fixing position in relation to the little circle on the headlamp, but with my new Gen 3 spirit I am unable to get this information from Toyota or Dealer.