How Do You Register for Safety Connect?

I just bought a Certified Preowned 2011 Prius. It has the Safety Connect button. I asked if the dealer could activate it for me and they said that they couldn't, because it wasn't a new car, and all I had to do was go to the Toyota web site and sign up.

All I can find on the Toyota web site is a description of the services offered with Safety Connect. That includes the price, but no link to register.

I've done a Google search, but that takes me to the Toyota page or a rather nice Wikipedia entry. Neither lets me subscribe.

Can anyone tell me what web site to visit or 800 number to call to activate Safety Connect, please?