aaPanel_Kern
Is the Panel SSL does auto-renewal in any cases? If not, i'd do:
ln -sf /www/server/panel/vhost/cert/sub.domain.tld/fullchain.pem /www/server/panel/ssl/certificate.pem
ln -sf /www/server/panel/vhost/cert/sub.domain.tld/privkey.pem /www/server/panel/ssl/privateKey.pem
Note: Please replace sub.domain.tld as your subdomain name or the domain name that you bind panel with.
When I do SSL renewal or Auto-renewal script from site configuration, it'll link to panel SSL and it's easier to validate it.