Where are the autobot symbols at on their alt modes in the live action movies?

I'm weighting a fanfiction (it hasn't been released yet on any web-site) and need this information. So if tu could tell me where the symbol is on each one of the autobots (at least the main autobots) it would be very helpful. It's for a fanfiction!!!! And if your wondering, it's about four girls who were once autobots back in cybertron. For the moment where I need this imfromation is where their cars get stolen por decepticons and they find the autobots in their alt modes. So if tu can, please help me!!