Intermittent Ignition Issue [66 Valiant /6]

Battery is at 12.3v. Shorts at starter. Battery connectors good. Ground wire from battery to block is good. Starter cables good. My relay only has 2 posts on it.
When I short on the other one I have between bat and sol, nothing happens but a spark. As in I replaced the old relay with this one you pictured, hooked up the battery, ignition, and solenoid, and got a spark when I shorted the solenoid and batt terminal. Car ran and drove today with no problems.