That handout is how I was taught to tie it back in the 1970’s, and how my dad (a RC Deacon) ties his when he wears one. It happens also to be how every RC priest I’ve seen vest ties theirs.
Note, however, that the majority of priests I know wear the knot centered, and everyone else off to the side. This is because, for priests, the hanging ends then get used to hold the stole in place by tucking them through the belt-portion over the stole. Bishops M. Hurley, Kinney, and Kineki, and Archbishop F. Hurley also did this.
Note that if the cincture is significantly too long, it can be wrapped around the body a second time before passing through the knot. I’ve had this happen a couple of times. (When asked to lead a Liturgy of the Word service at a children’s retreat, for one. Dad’s Alb and Cincture… dad’s waist was half again mine… and his cincture hangs to his ankle.)