I have a J&S Safeguard all hooked up and working, but I can't get the dual monitor to work. There are 2 plugs that go into it, 1 goes to the safeguard main unit. The other one has 2 wires that need to be tapped into something, but I'm not sure what. Any ideas where to put these two wires? I tried power and ground, but it didn't seem to work.

The other wires are for the Air/Fuel meter, so they will need to be tapped into an O2 sensor (signal, ground, reference ground.. I think).

You should see the "Knock" portion of the monitor cycle back and forth once when the J&S is powered up.

I found this thread helpful when I installed mine:

http://forums.nasioc.com/forums/showthread.php?s=&threadid=79153&highlight=Dual+monitor