I am not 100% sure of the plate you are speaking of, but maybe! If I am thinking of the right one the mounting points are the 2 bolts that hold the brake lines to the underside of the lower triple tree. If this is correct then continue to read.
You have an Interstate so you can not use these same 2 bolts as the piece will not be seen well up under the fairing. Remove 1 bolt and metal collar from each saddlebag. use the collar as a spacer, the longer bolt will allow you to bring the jewelry to a nice visible area at the bottom of the fairing. When inserting the threads into the triple tree you should have the brake line closest to the triple tree, then the spacer, then the jewelry, then the bolt head. the spacer should be positioned so the flat part is on the top of the jewelry. The bolt has an 8mm head
I hope this helps!
Huh? Now I'm lost. Why would aftermarket bling for the lower triple clamp suggest pilfering a spacer from the saddlebags.
Have you got a link to the product web site?