I'm honestly not sure how to proceed from here, aside from not shooting until we're out of sight of those other two guards. I do have ideas for a fake message, though.
Any other opinions?
EDIT: What I should say is that I'm not sure if we should spend this action trying to deliver a fake message or just let Ruukoto and the guard root through the bucket in silence. It's worth noting that I have no real answer to the question of to whom we're supposed to deliver the message, since I don't know if Sombraluz gets that kind of availability from Canus.
I am all for other suggestions, though.