Updating Endpoint database from 4.7 to 5.1

I'm still learning this so bear with me.

I am doing this in a test envirnonment before I move onto our production system.  

Here is my setup basically.

Console sits on test server,THOSAV01

database is on a sqlserver called QHOSQL2k801, no instance but the database is called "sophos47"  and I can get the console to see the database no problem from 4.7

Service account a AD user that is part of the dbadmin group that has access to the database (verified).

I've tried to run the BackupDB.exe but having an issue with setting it up to actually backup and convert the database.

So if I run the upgrade to the console it's not working cause it's looking for the newer database (if I'm correct) and cannot find the database of course

Can someone help me on this.  With having the database on a different SQL server, I'm kind of confused on getting it upgraded to the newest version..

Thanks