If I had to guess I would say this is the Nintendo Vs. board.
the interconnect is probably just the filter board for the old nintendo cages and can just be thrown out. Not much use in those things. However, a single picture would answer all of these questions
I do believe this is a VS board. It was pulled from a conversion DK. The harness I was referring to is the cage harness. And correct, they are not essential for the board to work.