Where should the rotor button be positioned when number one cylinder is at top dead center on 440 Chrysler engine?

When the number one cylinder is at top dead center (TDC) on a 440 Chrysler engine, the rotor button should be positioned pointing directly at the number one spark plug terminal on the distributor cap. This alignment ensures that the ignition system fires the correct cylinder at the right time, facilitating optimal engine performance. Additionally, it's important to ensure that the engine is on the compression stroke, not the exhaust stroke, when checking this alignment.