Ok I have seen several people say install it like a freeze plug with the cup side out. No I see several people saying the cup side goes toward the engine and you dimple the center of the plug to make it seal?
Which is correct????

Cup side in and

My friend Bill had installed his self-rebuilt Street Hemi in his Coronet. He was standing alongside it revving it up and playing with the carbs when the cam plug blew out of the block, rattled around inside the TorqueFlite bell and was ejected onto his foot! Stung a little! He managed to shut it down before more damage was done and learned the proper way to install the cam plug was cup side first, just like Larry said. You never forget those lessons!!

How did the factory do it?

Cup side in and use some good thread sealer on the block before installing the plug If you don't use sealer on the cup and block buy some five minute expoxy and seal the plug to the block around the cup edges, either way will help prevents leaks and seeping