I have an idea regarding where Jolt comes into the movie, based on the fact that we know he is a late addition and not part of the novelisations. In the novel, Ron and Judy Witwicky are apparently captured by a 'Con while on holiday in France. Now, I seem to remember somebody getting some video of the couple running down an alley, trying to get into a small blue eco car (or chasing one, I can't remember which). My idea is that Jolt might've been added to the script as a sort of bodyguard for Sam's parents, assigned to them by Optimus for their overseas trip. Perhaps even without their knowledge. It would at least give more tension for the whole "Decepticons snatching Sam's parents" bit, since you'd think the Autobots would've thought ahead there, and also because then you have an example to bring in a bit-part 'Bot like Jolt, have him transform, try and fight a 'Con and get killed. Makes the kidnapping more sinister and, I believe, makes perfect sense. Any thoughts?