I sent to, call them to find what all docs you need to send.
Visa Application Centre – Los Angeles
2100 E. Grand Avenue
El Segundo
CA, 90245
U.S.A.
Working Hours: 9:00 a.m. to 5:00 p.m., Monday through Friday
Phone Number: (646) 741- 0130
Email Address: la-info@csc-cvac.com