The fact that smallcock and save-cock are related terms seems a paradox. Why would you want to save-cock a smallcock? Forgive me, that was a misuse of the term, as save-cock is not a verb but a noun. But if it were a verb that’s what you would do.
According to the Dictionary of Newfoundland English, a save-cock is a large heap of hay, while a smallcock is, you guessed it, a small heap of hay. And that’s why you save-cock your smallcocks.
Now, would you combine your smallcocks in a save-cock on a nuddick? I guess that depends on how confident you are in your manhood. Those nuddicks can be kind of unreliable.