Application Support Centre for Fiancee/fiance visa

[cblpah]

This might be a long shot, but I was just wondering if anyone could verify what I know about this process. For context, I am a US citizen living in Boston, MA, engaged to a UK national.

1. Submit an application and pay the appropriate fees via Visa4UK.

2. Schedule an appointment at the US Department of Homeland Security application support centre (ASC) to submit printed application, biometrics information, etc.

3. Wait for the decision (that could take up to 3 months).

So I'm a bit confused as to how I can find the application support centres. Apparently the Boston consulate does not handle visas? For those of you living in the East Coast, how did you find the appropriate office? Any insight is appreciated, thank you!