I'm not associated with Veeam but I'm asking me why you would like to be able to have the backup config at more than one repository. In a case of a disaster you may be thinking of the backup server itself and the repository have to crash.
The repository itself could be located at another site / building / room which makes it very unusual to go down together with the backup server itself - a case that I haven't heard of so far.
What you can do - and that is the recommended procedure to backup your backup server - install Veeam Agent for Windows on your backup server and choose a third target (only containing the system partition with Veeam on it). Or, but I've never tried that, use another Veeam repository as a target for the VAW job and run a backup copy job with VBR. This way you will have the backup server itself, a repository for the backup of the config, a backup of the backup server and a copy of the backup of the backup server....
VMCE 7 / 8 / 9, VCP-DC 5 / 5.5 / 6, MCITP:SA