I am replacing a burned out crane ignition system on my 260z with a GM HEI module and will be installing a rebuilt distributor. I have found a lot of useful information on this forum, but still have one question. When connecting the pickup leads to the module the discussions refer to the positive and negative leads. My disributor has a plug with a maie and female connector from the pickup. My question is this: which is the positive lead and which is the negative lead? Thanks