Electrical Problem: Everythings Dead?

I can't fire it, I can only turn it over by crossing the terminals on the starter but there is no power anywhere so the ignition won't turn on. Here's what I have so far.........I finally got to it with an electrical testor and I have current to the starter but only on the big terminal. There is NO POWER on the small starter terminal and from there on. I have the small starter terminal wire going to the starter relay,,,then from the starter relay, the fuseable link go's to the bulkhead connector. Is this the right schematic? If this IS right, and the small starter terminal normally don't have current throught it, where does the ignition get it's power from? Also, if it IS right the blame would be the starter right??