QQQ is correct. "B" is usually used in commercial applications (thing 'B' for business), but the reality is that either will work as long as the same configuration is used throughout the installation.

The difference is the way the green and orange pairs are terminated. In one, they're swapped, and in the other, they aren't. I don't have my chart in front of me to tell you which is which.

There's a bit of info available here from Leviton.

Larry
www.fineelectricco.com