69-74 GM Muscle Cars A pre-wired factory style bulkhead connector plugs into to the fuse block through the firewall in the stock location. Easy-to-install, factory original, quick connect terminals are included for the in-dash printed circuit board. Pre-terminated plugs for the ignition and turn signal switches are included. 69-74 Nova, El Camino, Monte Carlo, Apollo, Chevelle, Cutlass, Skylark, Tempest and GTO.