Drop axle controls

Hey yall got a question, I’m leasing on to a company that uses 3 and 4 axle flatbeds to haul coils, as an o/o I can use both but need to install in cab controls to use the 4 axle trailers that can haul more weight. I’ve looked and looked but can’t find any videos or info about cost/how to install these controllers. I know id need 2 control panels, 2 dash switches and a couple airlines added but anything more than that I don’t know.

any help would be appreciated