My PS2 is a US v4R. You can't ignore any of the connections. However, you can connect the red and the black wires to different locations which make them much much easier. If you go to ####://www.consolesource.com/installation/p2-n25-cdr/usver4.htm# and look at the wiring diagram, points 1 and 2 can be connected to the wires going to the connector instead of being soldered directly to the board. This makes installation much simpler as these two solder points on the board are quite small.