I need help understanding Forever.

Hey guys, I read forever and I'm having a little trouble understanding the leader side of the book.

In some templates SSL for example Jim states the following:

"Squat: 5/3/1, 5 pro's, SSL"

Is He giving us a option to choose to do the Main lift for 5/3/1 for sets and reps only without the AMRAP or the 5 pros ?

Thanks for the help.