okay so for the SN95's MSD says to hook upthe rpm signalwire to the negitive lead coming out of the COP. My question is which one of these wires is negitive?I have a digital multimeter so do i just use that to check the voltage and see which one has 12V and use the other one?

 

i bought the msd connector for the 95, so im not really sure i think it was like $10-15 for the connector made the install much esiar took maybe 10 minutes to get it all hooked up and running

 

The neg side is the odd colored wire - each COP has two wires. One wire will be the same color from COP to COP - that's the ignition start/run wire....don't use that. The other wire will be different from COP to COP - that's the neg one and it's the one you want to use.
(I just did this same thing setting up my NOS window switch, so I know this stuff first hand..!)