Kaesop retro fit

Hi, I have purchased the front and rear kaesop retrofit kit for a K8 amp.
I can see on your Technote 0110 EN how to connect the front RJ45 board to the main Kaesop board.But which of the red sockets on the main board do you connect the rear RJ45 boards to,thanks, Martin
I can see on your Technote 0110 EN how to connect the front RJ45 board to the main Kaesop board.But which of the red sockets on the main board do you connect the rear RJ45 boards to,thanks, Martin