Can you be more specific in terms of wiring? Your best best is probably to just pull the wiring and put in a new JAMMA harness and reuse the existing kick harness. This is a time when pictures really help.
the gist of arcade wiring, and this is a BROAD GENERALIZATION is:
Power in, power splits to ISO transformer for monitor the other side goes to switching power supply. JAMMA harness wires into power supply and that harness connects to pretty much everything else (Look up JAMMA wiring diagram) the kick harness for SF2 plugs into the SF2 board and leads to the kick buttons on both players.