i have a 37 ford pickup with the flat head in it. There is a electronic distributor on it. there are 3 wires that come from the distributor. wires are Red, Green and a Brown. I am trying to figure out where the brown wire hooks up to it. looks like it use to hook up the generator or grounded to the block. I just need to hook this up to be able to drive it. Is there anyone who can help me out?