TRIM Web Client 9.3 pointing towards the HPE RM 8.3 Database?

Rather silly but urgent question:

How complicated (what needs to be done and where)  would be to use the Content Manager Web Client 9.3 Environment to point the url towards the TRIM HPE RM 8.3 database, (Without upgrading the database) ? Is it possible? Like when we use the higher version of CM 9.4.1 Desktop Client to point towards the current HPE RM 8.3 TRIM Dataset?

thanks