If it is a K4 or later, they are also the ground point (Green wire) for the wiring harness, at the left side's coil mount in front. There should be a bare spot on the frame where it was originally masked off before painting.
If it is a K3 or earlier, ignore the above...
![Cheesy :D](http://forums.sohc4.net/Smileys/default/cheesy.gif)