One thing that makes Sci-Fi pieces of scenery or bases appear more realistic is armored cabling. At first look this can appears to be a daunting task to model but in reality it is very easy to achieve.
All you need are metal guitar or bass strings. Whilst thinner strings are just plain wire, thicker strings are wire wound and come in a variety of sizes. If you don’t play guitar yourself you probably know somebody who does, so just ask them to pass some old strings on to you next time they are changing them.