I know what they remind my of but wont say here, never seen a power cord on one before likes
If I knew exactly what a 'CyberPunk' theme was surposed to look like then I would be able to pass a more constructive comment.. Do you mean like an industrial type style eg: look like some sort of machine?... If so then yeh thats a good start as they could look like the old gauges on some stuff, mostly water and oil type gauges..
If I am wrong just ignore my ramblings lol