To add SCUBA's American Airlines Business Extra number to your reservation.
THIS DOES NOT COST YOU ANYTHING. YOU STILL EARN YOUR ADVANTAGE POINTS AS NORMAL.
Sign into your AA.com profile
Scroll down until you see the HELPFUL LINKS TAB
Choose Reservations Preferences (it's not too clear on this pic)
Near the bottom of the next screen you'll see Business Extra Number
Ours is 868002
Just add that to your reservations preferences and you won't have to add it each time you fly.