D.O.T.Regs/Laws about power harnesses

I'm not sure if this question belongs here,if not the Mod's will put it away.I ordered the Power Harnesses from "Diesel Freak" for my ol' Freight with a C-15.I'm going to put them on,my "Paranoid" little brain started and now I realize I have no clue if I'll get dinged or an O.O.S. for it when they see the "dial" for the adjustable on the dash.I will/would try to place it in a more out of the way place if it's a violation,but it wouldn't be quite so user friendly if I need to tuck it under the dash.Anyone whom is more familiar with the Regs./Laws on this would be appreciated.T.I.A.

 

Thx. RedPete.The way the new laws are "evolving" I just like to get more experienced opinions.

 

With this I'm gonna keep it around 3-5 so I'm not going to blow much smoke,cept on big grades of course. I've already had the E.C.M. Tuned up so I guess they could prob. ding me if they dumped it,but I'll just try to keep cool, I just wasn't certain of the Regs. of an "aftermarket" mod like this one,so i just thought I'd do a bit of C.Y.A. deffering to an incredibly knowledgeable group, such as yourselves, that are on this awsome Forum.Thx. again all...Shift+R improves the quality of this image. Shift+A improves the quality of all images on this page.