Is there any way of hooking up an 85 display board to an 86 mainboard? Since the 85 and 86 use the same size screens.... th only problems I see is that the 86 has an extra connection between the two boards (15 small, 3 large), and the 85 has 15 small, 2 large. (The two boards are differents in layout as well, similar though]) What does the extra connection do?