where would the canister vent valve be located? on 1998 Buick Century

I replaced the purged valve, it was mounted on the side of the canister. I have a code PO440A.
Also replaced the fuel filler neck, mine was rusted really bad.

Asked by for the 1998 Buick Century
on the canister mounted to it
Ok,I replaced 1 valve on there, It had a hose and electrical hookup. Where is the purge valve then, I only saw 1 valve on the canister?

there is a purge valve on valve cover near alt and a purge solenoid on left hendle side of eng near firewall