Air Compressor Flaw in Bus

The air compressor part in the Wentward bus is (incorrectly) under the engine, instead of the frame. In the comments in the jbeam, it says "to do" mount to the frame. This would make it so that any engine would run normally with the new air system. But instead, any engine that isn't the default one is now broken, because there is no way to build air pressure.

I tried adding the compressor into one of the non-Beamng engines, but it didn't work. I probably did something wrong, since I don't know how to program, but when I tried, the engine just stopped showing up in the menu.

Edit: I fixed it. I had to manually add the lines for the air compressor, and since I don't know what I was doing and this was all guesswork based off of what the code in the default engine looked like, I didn't realize that one accidental bracket somewhere made the entire engine not show up. And that I have to restart the game every time I want to edit the code.