I am looking to install a rocker switch for my led light bar. It is a 22mm x 36mm switch. Is there any good way to install a switch like this? The switch says it installs in a "standard switch opening". The only knockout I see in the whole truck is the one near the parking brake handle. I popped that out, but it is bigger than 22 x 36. Is there a filler panel that can go in there? What is that pop out for on these trucks?