I have my MBHP CORE V3, together with 4 DIN and 4 DOUT boards. I am assuming all 8 of these boards will connect to the same port on the MBHP CORE V3 board. So am I correct in thinking I can use a single y-cable, and connect 4 DIN and 4 DOUT boaards in a cascading fashoin, and connecting the middle of the Y-cable to the CORE. I intend connecting 128 LED's and 128 momentary switches to the boards. What I do not understand is how will I know in which order to place the DIN boards, as well as the DOUT boards, because to me they all look identical. Am I missing something obvious? The boards were built for me by a friend. Please advise.