Hi! If your husband is filing the form I-130 alone, he can send the (I-130/CR-1) packet in to this address:
For U.S. Postal Service:
USCIS
P.O. Box 804625
Chicago, IL 60680-4107
For Express mail and courier deliveries:
USCIS
Attn: I-130
131 South Dearborn-3rd Floor
Chicago, IL 60603-5517
Good Luck!