Where would be the best place to find grounds for the engine bay of an FC? (s4 n/a, though that likely doesn't matter)

I'm under the impression that grounding issues are likely the cause of my 3800rpm hesitation. If that's not correct, someone please set me straight.

Thanks!

-Collin

 

Pretty sure Aaron Cake has a write up on where they all are and how to clean them.

 

http://www.aaroncake.net/rx-7/grounding.htm