>>720315664
>>720315920
The tail should be an extension of the coccyx. Anatomically there's not really a good explanation for how an anthro tail works since the coccyx has functions in the body, but if you think of it as a branch off of the coccyx area that's fine and it's a concession for the sake of the fantasy. The tail should be right where the hard point at the top of the butt is, close to where the cheeks split.