hmm so not sure about the production version (since mine's a test-fit version that I did have some issues with - which I reported back to him and he fixed it on the production version), NH also provided a switch holder and there's a hole on it.
I then ran a short extension and ARB coupling to it because with it sitting next to the engine bay and running in summer time, the brass fitting and brass coupler on my leader hose get REALLY hot. So hot that it burnt through 2 pairs of those Mechanix heavy duty gloves. With that setup, it's been solid and no movement. when plugging in and unplugging a coupler. This was done recently.
Prior, without the extension and ARB coupling, I had a NPT fitting plugged to the ARB manifold. Never had an issue with structural rigidity at all. The only issue with the coupler getting hot and that's not a NH issue but my own.
if yours is not rigid enough, hit up NH and see how he can help you.