how to set PACKAGESITE for old release

From: hlyg <hlyg2023_at_outlook.com>
Date: Sat, 09 Dec 2023 21:11:04 UTC
i've installed 10.2 and run "pkg", default configuration no longer works

how to change it to use 
http://ftp-archive.freebsd.org/pub/FreeBSD-Archive/old-releases/