Pretty much like the JNS plate. It sandwiches between the fender and triple clamp and extends down the fender. There's a few plates screwed through the fender into the conduit " barrel". I guess the hole would be appropriate for a 50cal. People keep noting the Warthog theme so it needed a barrel coming out of the nose. It already has the minigun muffler.
What a transformation! You have a great vision for your bike. I loved reading this from beginning to end. BTW, I know how bad that hurts when your best friend in the whole world is gone. Mine was Bailey, a beagle/Jack Russle mix. Smartest and most loving friend I have ever had. But, look. It gets easier with time. She would ride on the mower every time I cut grass. With a big grin on her face. And one on mine. Riding the bike helped me more than any talking or sharing.