Power Joy -- How Can I Add a Controller 1 Port?

[ismouton]

This is the Power Joy with the controller built into the NOAC board. It also has a built-in lightgun. I was wondering how I could wire a controller port 1 to it. I am already familar with the pinout; I am just unsure where I can find find the "clock" and "latch" for the player one port. I think all the other pins are shared with the Player 2 port.