70s Power Wagon Ignition switch info needed !!

I just reread the first post, you bought the key part of the ignition switch? You're right. Nothing electrical there. Won't help you much.
Usually they ask at the parts store if you want the key part or the electrical part when you ask for an ignition switch.

Another thing to check. So you have those replacement battery cable ends with the "mickey mouse ears" on them? You know, the 2, 1/4" bolts that hold a metal strap on to pinch the bare cable ends? Those suck. I've also had the positive side cable turn to nasty green. "dust" within the insulation and not be able to carry near enough current thru it. I make my own cables, crimp copper lugs onto the cable and bolt those lugs to the "mickey mouse ears" on those terminals. And heat shrink the terminals.