The stereo is mounted on a piece of hard ABS plastic I cut out, and wrapped... The amp is mounted right under the deck on the same plastic... I keep it locked at all times, since I don't have to access it. I wired a switch for stereo/amp power and also wired the deck to keep memory. So anytime I turn it on, it automatically connects to my phone via bluetooth and I handle my music there.
One side is pretty much full, except small items, but the other side has plenty of room... (dont mind the ugly bag interior... I removed the carpet I had in there and am replacing it with the material you can see folded on the bottom of the bag (and also the amp is mounted to)