Thanks, I looked in the backup XML file and everything looks OK, all the specific data is there. The backup ran OK on its schedule so that is fine.
If you look at the attached image, you will see that the connection is not showing, this might be because it is an SSH connection? This is what confused me, if I choose a connection it then blanks the database at the bottom of the form.
I just don't know if it is safe to leave the connection name as unspecified when editing a job, or whether I need to re-specify the connection, and then re-specify the database?