stuntis plant wants to get into the new car…

good evening, as soon n new car is coming up, or I take over from my father, my whole audio-ware (which has been standing in my apartment forever, ash above my head…) is supposed to be installed in it, and to some extent reasonable. I want to put all my questions in here so that I don’t always open up my own thread to every crap. in electronics it’s the following —> I’m the electronics and here it’s all supposed to start from the front and from the back I would like to ask the question, where in the case room the two end stages + the two caps should be installed. the sub already takes a lot of space away, so I would like to have something about in the case room.That’s why I have 2 ideas: 1.each one end stage at the two sides of the case room, somehow with a mdf plate or so fixed?! 2. as you can see here, there is a whole lot of space in the spare wheel chuck.if I throw out the wheel, then everything would have to fit in there easily, wouldn’t it? what does this look like with the ventilation? should one then also lay out the hollow with mxm mats, or is this rather superfluous? hope to answer some mfg stunt