I think once all parts are installed and running, all boost controller settings nailed down, then I'll start to hide things away. I'm looking around the cabin for good places to do this. Centre console possibly. Maybe even mount a couple of gauges and the boost controller into some sort of box that can be brought out for tuning/setup and left hidden away. Plenty of room behind that lower panel beneath the steering column. Or the same location on the passenger side.
I've bought an analogue AEM AFR gauge purely because of its subtle looks so will see how it looks and decide then.
Edit: building it all into the glove box is another option