Somebody was telling me a story about the manufacture of those. During the assembly on a moving production line two operatives had eight seconds to connect all the electrics in the engine compartment. There were each on a swinging stool either side and they would whirl in, connect everything and then whirl out. There then would be a pause before the next car came along.
Every thirty minutes two others would come along and take over.
Why they didn't arrange it so that they moved along with the line defeats me.