70 C20 no power!! HELP!!

[DEESTER157]

So I’ve got a 70 Model C20 that did not have an ignition or starter when I purchased it. Bought everything for the ignition and wired it up, bolted the starter on and wired it up, then hooked up a good battery and.....nothing! No headlights, dash lights, or any power at all inside the cab or anywhere. I have no idea why. On my starter I’ve got the hot wire that goes to my positive battery terminal hooked to my big post on the starter, yellow wire going to the R side(small post), and purple going to the S side(small post). Should there be anything else hooked to the big post besides my positive wire that goes straight to the battery? It’s like I have no power to my harness. What else could my problem be? If everything is hooked up right then is it possible that the positive wire is bad and I’m not getting juice down to the starter? I don’t see any other wires that could be hooked to the big post on my starter. Please let me know what y’all think. Thanks