Squid HTTPS Transparent proxy with Splice All + SquidGuard Blacklist (No client certificate): Safesearch option does not seem to work

[sultanofswing]

The "Use SafeSearch engine" Option in CommonACL of SquidGuard does not seem to work with the above options.

This seemed to work with the "Splice Whitelist, Bump Otherwise" setting in Squid + Client Certificate installed (tested it on one PC) but i did not want to install the certificate on all of the PCs and other clients.

Is there a way to get SafeSearch to work with the first option?

Thank you