I Dont have Paid access to Scotlands People
Neither does anyone else. Scotland's People is not a subscription site. It is pay-per view (very modestly priced compared with the corresponding Australian web sites) so you have exactly the same access as everyone else, and no-one can look up James Haren's birth certificate without paying for it (other than in person in a Scotland's People Centre where it's pay-per-day instead of pay-per-view).
Attached is an extract of the listing in the births index, from which you can see that James' mother's maiden surname was O'Reilly.
There is no index listing of a marriage of a Haren to an O'Reilly in Scotland. There is, however, a marriage of William Haren to Mary O'Reilly in Enniskillen, Ireland on 15 May 1898. See
https://www.irishgenealogy.ie/en/The index to the 1921 census at Scotland's People lists a Haren family in Hutchesontown consisting of William, 46; Mary, 45; Mary P, 16; Margaret, 14; Arthur, 10; James, 8.
There are 5 births in Hutchesontown of Haren children with mother's maiden surname O'Reilly. See attached.
Oh, and Hutchesontown is a district in the City of Glasgow.