switched 12v source for my Holley Sniper

Read that thread^^^ There is no magic wire. The ignition switch only has 4 outputs
1...ACC hot only when key is in "accessory" powers things like radio, wipers, etc
2...Start--usually yellow, only hot when key is twisted to "start" and fires starter relay and starter
3...IGN2 the bypass circuit, usually brown. This is a separate switch contact than "start" but is also hot "in start". It goes to the coil + side of the ballast resistor and FEEDS THE COIL HOT VOLTAGE when in "start." IT is the ONLY source of ignition power during start/ cranking
4....IGN1 or "ignition run." This is hot ONLY in the "run" position and goes COLD during "start" or cranking.

Usually with no ballast type ignition, jumpering IGN1 and IGN2 together will do the job