Together with the aircon kit I got the metal "box" that is normally fitted to the bulkhead. It's welded to the bulkhead on the holes where I drilled out the spot welds.



The vaporizer also needed two brackets on the bulkhead. Unfortunately I didn't have those, so I bent some small metal plates in shape. Welded a nut on the backside and welded the brackets to the bulkhead.



After that I sealed all the grooves on the in- and outside.



And also sprayed everything to make sure it won't rust.