It's open to artistic interpretation. Some like to do a hole and another tape tab that goes above the tail, some just have a hole where it just miraculously fits through. I'm not an artist but it hasn't weighed on me too much.
im not a fur myself but have you guys considered velcro? its cheap to get adhesive sided tabs to stick em on the back of the diaper. Im aware that some tails are non removable but for some it may help.