Which preposition to use with spigots

of Occurrences 3%

He quickly fastened one end of it to the spigot of a molasses barrel, which stood about half way back in the store.

in Occurrences 2%

One of these had a spigot in it, and as I had eaten little during the day, I was glad of a cup of claret and some food.

into Occurrences 1%

On the very first forenoon, our thirst was so excessive, that the farmer contrived to insert a spigot into this huge cask, and really such a treasure I think was hardly ever opened to a set of poor thirsty spirits.

on Occurrences 1%

It had a spigot on it as if it were made for traveling.

Which preposition to use with  spigots