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The upper pic is the back of the switch with a heavy red wire already connected by the black wire at the BAT terminal. That's the first pic he sent me before discovering the other wire not connected. the lower pic is a loose wire that was just dangling in there. There's not another terminal left on that switch for that extra red wire.Yes, That red wire definitely needs to be connected to the ignition switch, on the spade terminal right next to the one with the black wire. It provides the +12VDC power to a lot of things in your car's electrical system, and it is an integral part of the battery charging path. The red wire has NOTHING to do with an HEI installation.
Steve
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