For wire, go to an electronics store and look for "wrapping wire". It's fairly thin and easily poseable. If you don't have luck there, go to Detailmaster.com and order a few spools of their 1/24 ignition wire.
As for the Rowan Contactors, If I were you I would have cut the originals off and scratch-built a new set, that way you could install them on a plate - as the original's were mounted on a slim aluminium plate, much like everything else on the car's. Although, some new tops would make a world of difference.
When painting them, be sure to paint the base in a dark red and the top section a bright red, like the originals. Looking forward to more updates, your doing a good job.