Slipseat Boxes

How many of you remember having boxes with your electronic equipment installed in it so you could easily carry and setup your cb or radio in the truck. Maybe you would be in more truck in a day or a week? I ask this because I have been thinking about a particular two way radio I dont think will fit in the overhead compartment of my assigned truck. The company has a rule prohibiting drivers from installing cb radios. I understand this is to prevent damage or modifications to their trucks. I completely agree with said rule and have no intention of modifying their property. I was considering having them install the antennas and me building a slipseat box then simply connecting to the wires overhead to the box which could be secured to a seat base with a bungee cord. I could also simply get power from a 12v outlet. I’m not sure if that would be frowned upon by the company or not as long as their property is not damaged. I was thinking of putting a cb a scanner a gps maybe a car stereo in the box that could be connected with appropriate leads.