Hi Alfraser
The image that you have viewed on line is the cert. and is what you would receive if you ordered an official extract.
Unfortunately, if it hasn't come up on any of his official registration records to date in Scotland where he came from in Ireland, you're unlike to find this info elsewhere.
Church records ~ I don't know to be honest. I normally only use the official BMDs. Maybe someone else could comment. It might help if you posted what religion/Church he belonged to.
Regards.
Monica

Added:
Have you managed to find any siblings for him in Scotland. It may be that their place of birth may have been recorded in one of the censuses....
Another option, if he came over with his parents and more children were born here, the Scottish siblings' birth certs should show the parents' marriage including date and place of marriage in Ireland.