*Need help on how to wire up a switch panel*

I got it all wired up with the new relay. It cranks and fires up for a second, but doesn't stay running, like the ignition stops when the start button is released. Normally, the car starts right up before I messed with the wiring.

I don't have the black wire from the stock ignition switch hooked to anything, and my Haynes manual seems to be missing a page of the schematic. Is the black one supposed to be hooked up somewhere? I assumed it was a ground, but now I'm thinking maybe not.