I am redoing my engine wiring harnesses, these 4 wires come out into the engine bay through a hole in the firewall to the right of the steering column. Are these the Zenith choke wires and speed sensor wires? They are green/white, violet/black, brown, and blue/black. Can't find anything definitive on the wiring diagram. I am thinking I don't need these given that I have neither emissions crap or Zeniths any more. I had 2 of them tied off before so I want to confirm the other 2 before hiding these.