Another update: I decided to try an alternate solution, by placing momentary switches over the existing contacts, and it works!
That being said, I know this isn't a sleek as using the existing circuitry, but I'm definitely not brave enough to mess with the pins controlling my cruise control, so this works nicely for me
I detailed the steps I took here on my site:
https://swiftstate.com/2020/09/24/di...st-controller/