The fuel pump relay, if you haven't removed it, has a pin for the cranking signal, which comes via a wire from the fuse box. The EZL unit, which you probably also removed as you appear to have a glow relay there now, would presumably also have an ignition-on wire coming from the fusebox as well.

If you can figure out the colors (those diagrams help, I can see a promising plan of action in there with the socket S deal), then you can just get those two from the source at the fusebox.