how to modify the URL to point towards lower environment career site

Summary:

We are currently testing few features in our lower environment (DEV3), including the candidate referral process.

When a referral notification is sent to a candidate, the email contains a link to apply for the referred job. However, clicking the link results in a "Page Not Found" error. Additionally, when the candidate selects "Go to Homepage", they are redirected to the production career site instead of the DEV3 career site.

Could someone please advise where the URL configuration can be updated so that referral emails generated in the lower environment direct candidates to the corresponding lower environment career site rather than the production site?