Congratulations on your first unit. On my unit it has a Trail Air pin box with a shock mount. I formed a bracket to slip into the gap between it and the pin box. It's a snug fit so no bolts or clamps, easy in and out. If interested I can take some pictures the next time I'm at the unit.

I Like your rig.. We just bought our first RV and am really curious how you have attached your American Flag to the Pin Box. I have been thinking that I would put it on the back attached to my ladder, but I really like the pin box location