I got tired of my label maker labels falling off my home theater wires. I made these to organize my speaker wires. They clip onto 16 gauge speaker wire. They are tight enough I can hold up a reel of wire just holding the clip so they shouldn't fall off. This is for a 7.1.4 setup. You can of course use it for 5.1 or any other configuration. They are: FL (front left), FR (front right), CTR (center channel), SUB (subwoofer), SL (surround left), SR (surround right), RL (rear left), RR (rear right), AFL (Atmos front left), AFR (Atmos front right), ARL (Atmos rear left), ARR (Atmos rear right). (Atmos files included but not show in photo).
Print at your printers finest resolution. I used Cura/Extensions/Post Processing/Modify G-code/Filament Change script. It pauses the printer so you can change filament to get the 2 color labels. That should be layer 20 where the letters begin (at 0.1 layer height). This is a quick print. They entire set took 30 minutes with filament change. Or you could print them all white and use black sharpie over the face of the letters.
Print them all at once with letters up and no supports.