Look on the top of the SC... dead center. The fuel rail goes over that hole and the bolt goes into it. It's a 13mm, then the engine cover goes on..and the black plastic coated 13mm nut holds the engine cover onto that stud.
That's the stud you'd maybe have in your charger bolts. orrrrrrr
IT's a 10mm stud with a 10mm nut. This would go on the rear driverside of the charger by the throttle body. then the EGR shield is held to the stud by that 10mm nut.