Ahh, you're right. An earlier draft allowed up to 4 connections to the Heart, but I ended up changing that for the sake of simplicity to just let the Heart act like the other locations. Just forgot to update the list of values. I left the value of 1 in there just to let the lists of numbers all be the same length, although that's a moot point if I fix the list to account for the other issue.
If I thought I could get away with just writing Sum Mod 4 + 1 I'd do that, but listing the values seemed like the better option.