Mopor 273 Engine Vacuum Advance Hook-up

Hi there, just wondering where to hook-up the vacuum advance on the distributor for my 273 engine. It's currently hooked up to the carb up high above the throttle plate. I don't seem to get any advance with it hooked up there. I read somewhere that since I have an automatic transmission, it should be hooked directly to the manifold vacuum. I'd appreciate your comments.