For proper cooling this generator should run in the open. The sliding tray is the best idea for your situation IMO. If you need to run it while traveling have a portion of your door cut out and a smaller door installed with the hinge to the rear and open it just enough to form a scoop to force air in and have holes in the rear of your box for the air/CO to escape. BY ALL MEANS HAVE A FULL TIME CARBON MONOXIDE DETECTOR INSIDE. Sorry for the caps but this is most important.
My 2K Honda is mounted in a tray on the front bumper of my RV. I have a 10ga.electric cord run along the frame and to an automatic transfer switch so I can use gen.when traveling. I made an adapter to utilize both plug-ins on the gen to plug a 30 amp cord into.
