Well… I want to suggest having a specialization of “Fit Cable Harness and Automotive Battery” (maybe in one or two seperate steps) which happen between “Fit Steering Wheel” and “Fit Lights”.
The Automotive Battery and the Cable Harness are crucial parts in car manufacturing because it connects all the electric components that have been already added or will be added.
I also think that “Fit Electronics” and “Fit Air Conditioning” should actually happen before “Fit Interior” (Seats, etc) because how is one going to add all the wires, cables and pipes if one has already finished off all the leather and clothing.