Nothing published that I'm aware of so it's your preference. I would check placement first by using some painters tape to mark it out. There is no right or wrong here. Here's a side profile pic of my boat as a guide. My wife's shoulders are about dead center with the P but depends on how it looks on your boat at your helm.
Not sure how many inches below the rub rail it sits. This thread contains a lot more pics of the boat.

https://forum.supraboats.com/showthr...light=sunsport