I see there are two bolts and a pop rivet for mounting it but I can't see how I am supposed to use the rivet. There is no hole in the tach body for it that I can see, just the threaded brass hole which I think is for the vent tube holder.
Anyone (Thomas, etc.) have any advice? I may be overlooking the obvious but I am stumped. Thanks
Also, how should I prep the plastic housing for paint?