No wiring except for the signal and shields from the RCA's. Signal to the input of the driver PCB, shields to the respective input grounds of the driver PCB. For Joe's board that I believe is 1L/1R for signal, 2L/2R for shield ground. That's assuming you're running coax from the RCA's - With a twisted pair setup it's the same except no coax shields (one wire to each "hot" on the RCA, the other to each RCA's ground lug to terminate at the driver PCB).