The switch I ordered came in today. I can see the 4 racks of 4 pins plus a common pin each, but I haven't been able to find anything that really shows which rack would be 1,2,3 or 4, or which direction you would number the pins in. I'm assuming that the positions would be pins diagonally across from each other, so if you're looking at the switch from the bottom, the pins on the upper side of the switch farthest to the left on each tier would line up with the ones on the bottom edge farthest to the right.