The connection wouldn't be assembly lines but soybeans.

The idea of the Ford first assembly line of 1913 was not entirely original to Ford. Meatpacking houses in Chicago had already been using "disassembly" lines for killing and processing pigs and cattle. Like in Ford's auto plant, it made sense to bring the work to each of the workers, rather than have them carry tools and equipment around to the work. It also was very much in line with Taylorism, the theory of Fred W. Taylor, the first "efficiency expert", who thought that workers' tools and movements should be minutely specified and controlled in order to avoid wasted energy.

However, although he is known today as an automobile manufacturer ( and anti-Semite) , Ford was of equal importance in what he did for agriculture. He was immensely sympathetic to farmers. Growing up on a farm in rural Michigan, he knew how hard they worked, wanted to make their lives easier, and really was instrumental in creating modern industrial agriculture. Ford would introduce the first real tractors ( as opposed to steam traction engines) . He also put a lot of effort into developing the cultivation and industrial uses of soybeans.

Carver was working on getting the south away from just growing cotton, a crop that was low in price, high in labor and hard on the soil. In doing so, he had also experimented with soybeans ( first as a rotation crop to improve the degraded soil) , and like Ford he wanted to find new industrial uses for farm commodities like soybeans, peanuts and sweet potatoes. Ford learned of Carver after becoming a donor to the Tuskegee Institute, where Carver was on the faculty. In the 1930's, after Ford had created a laboratory to work on soybeans, he began corresponding with Carver on the subject. He donated to Carver's own laboratory, hired him as a consultant for his own agricultural projects in Georgia, and would always hold Carver in very high regard.

Watts, S. (2006). The People’s Tycoon: Henry Ford and the American Century (Illustrated ed.). Vintage.