There is ample evidence to suggest an anode, unless in close proximity to the protected metal ( within a few feet) will offer little or no protection. Further, having an anode outside that radius can potentially (no pun intended) exacerbate the erosion of metals because it sets up what is essentially a battery causing a difference in potential between the anode and the metal of concern, I.e., the shaft and prop.
Additionally, Hunters with which I am familiar are deck stepped masts meaning there are multiple 'connections' between the mast and shaft/prop, all of which create slight resistive points and can therefore have different potentials. Remember Ohm's Law.
Stated differently, an anode attached to a stay might offer some minimal protection but likely not and could do more damage than good. Better to connect your anode to the engine, even better to the shaft.
Your profile doesn't denote which Newport you are in but if it's the RI one, your season is ending soon enough such that another month or so isn't going to matter unless you have some serious galvanic issues.