Welcome.
Not that I am aware of. Some people don't like them out of the firebox door for moving purposes. Some people find the ones on the front by the cook chamber door are a shin buster. At the end of the day I think wherever they go is fine so long as you have good airflow.
On the mini's I am very slowly building I intend to put them next to the firebox door with a 90 bend into the firebox.