First, I'm guessing you mean the joysticks are connected to an I-Pac (J-Pac connects the PC to the Jamma cab)? Anyway, if the I-Pac works like the KeyWiz, you should be able to wire in parallel (i.e.--the positive wires from the joysticks connected together at the I-Pac's U/D/L/R slots, and the negative wires connected at the ground). This is how I have two different joysticks wired on my Keywiz, and they both seem to work without any problems (you just can't use both sticks at once, but the nagain, why would you?). Think of it this way--all the ground wires are connected together some way, since there only one or two GRD connections, so connect the two joysticks the same way on the positive end. Anyway, if you want more detailed info, PM me and I'll see if I can make a diagram of it.