My 2012 car has developed a "drip" from the bell housing "hole" as have a number of vehicles.
Seems that the also common? draining of oil from tank to engine on standing has joined forces with the leaky seal to create my puddle.
Have you carefully inspected your oil tank for leaks? There is some evidence that early type tanks can be prone to this, particulary if the oil tank has inadvertently been over-filled. Check around the tank end panel welds for signs of oil weeping out and also check the areas under each end of the tank for 'moistness'. [These areas should be bone dry.] Any oil leaking from the tank will work its way down from here to the bottom of the bellhousing before leaving a puddle on your garage floor!