Hi Volvic / Chris.
I come from the Donegall Road area and as kids we were told that the Donegall Rd., children's playground was built over a mass burial site, related to an epidemic in the 1800's (Christoper may have some info on that). The playground was a couple of hundred yards before Roden Street, on the right going out of town. It's been redeveloped and houses have been built on the site.
Volvic, I think your best bet for their burials has to be the City Cemetery, which would be about 2 miles or so from Donegall Pass.
It's a straight run from Donegall Pass, across Shaftesbury Square, straight up the Donegall Road and cross the Falls Road into the City Cemetery.
Regards,
Dixie