c. Yellow – Ignition start. (ignition key cranking position only) You must use the included starter solenoid wiring for the engine to start properly. (Mopar muscle cars: You will need to use a momentary push-button starter switch with this wire on one post and 12v on the other post, the dual ignition circuit of a late 60’s to early 70’s Mopars will not work with the Hemi system) - Is there a work around? I really don't want to use a push to start button and a key. I'd rather just use the key.