I'm trying to send my visitation form to Deuel Vocational Institution (DVI) but don't know the right address to send it to well the visitation office address

Deuel Vocational Institution Physical Address: 23500 Kasson Road Tracy, CA 95376 (209) 835-4141 Mailing Address: P.O. Box 400 Tracy, CA 95378-0004 Visitation: Saturdays and Sundays from 8:30 a.m. to 3:30 p.m. And the following holidays: Independence Day, Thanksgiving Day, Christmas Day and New Years Day. To schedule a visiting appointment, call (209) 830-3900 on Fridays, between the 8:00 a.m. and 9:00 a.m. or email dvivisiting@cdcr.ca.gov Monday or Tuesday between 7:00 a.m. and 9:00 a.m. For updated information concerning DVI visitor hours or closures, please contact the Visitor Hotline at (800) 374-8474, and follow the voice prompt for information specific to DVI.