H4 Biometrics appointment

I have received H1B transfer approval in premium processing but yet to receive biometrics appointment for my spouse H4. It seems the wait period is 2-3 months to receive biometrics appointment.
I need to relocate to another city in the next week.
How to receive biometrics appointment at new address and reschedule the appointment to ASC in new city?

Regards,
Seshasai.

You can change the address using form AR-11 online.