Hi, good question... I had to look around a bit to find where to vote (the format seems to have been changed). OK, you'll need to go to https://hubpages.com/community/Shadiws-if-the-Mind... (by the way, I looked at your hub and Ripplemaker left a comment informing you of that link too). That 'hubnugget suspense' hub looks like a fiction story but actually also contains voting polls for each of the categories. Your 'Silent Treatment' hub is there among the other nominees under the 'Health' section, about a third of the way down.
Hope this helps. Your question really resonated with me because I was a previous Hubnuggets nominee also!
If anyone else is reading this, do you know why the Hubnugget format has been changed?? The voting layout used to just be in the topic category listings and it was much more user-friendly for voting.