I don't know much about automobile stereo installation. Actually, I detest it as a whole, it always seems like a hack job, like the piles of cords behind a desktop computer, or entertainment center. I figure that if you are going to hack something, do it in the name of reducing vulnerability, but a stereo really elevates the experience of driving.
So, I repurposed one of the holes for the passenger dash pad to hold a repurposed exhaust hanger for a mounting clip. This 40 has the charm of a chopped stereo hole in the dash, which is fine with me, because I didn't do it. The wire nuts and wires are just a prop; I'm not done, but I ran out of daylight.
I have, and can still use, an OEM glove box lamp from City Racer, but, I decided to use a modified, un-polarized, 110V plug for the stereo B+, and ground, so I didn't have to modify the harness, fuse block, or run a wire off the battery. I painted a white mark on top of the plug to maintain orientation of polarity, which isn't necessary for the OEM lamp. The stock harness stereo circuit (with OEM inline fuse) supports switched power leads for the ACC and ILL on the cd player.
The right speaker. I could probably go up an inch or so on it, but I like the acoustics here. Although, I really wish not to actually see anything but rust and Toyota on this rig.
If I can't have a three-on-the-tree with a bench seat and a tool box under it, so I used the space for hiding the left speaker. I'm running the wires parallel with the one to the rear heater fan, and my choice of modified routing for the fuel tank sender, and reverse light switch.