Here, gentlemen, is your Jefferies Separator.
Most of the lettering is guesswork. I could only make out "Trans.-Plas. Sep. 147a" on the arm's upper left corner. I also filled it with red blood instead of green, since we are on a ship mostly comprised of humans.
Best pic I can locate off the top of my head for that front lettering is from "Spock's Brain:"
Top and bottom buttons look to be labeled with random numbers and letters with some superscript characters (as usual). Middle button looks to be STARTFLO or STANIFLO or something like that.
Having helped to light actual TOS
-era sets, I can tell you, Donny, that one of the things that's missing that will make the sets pop is using a cucoloris in your lighting. Instead of smooth, bland (albeit colorful) walls, I think you need some "texture" to make the rooms look like something is going on there, instead of just looking dead: