I had looked at that marriage, but missed the Morwood as a witness, strongly suggests a link as it may jane’s & George Morwoods daughter.
I like the logic of Margaret being Esther’s mothers name & the fact her first daughter was Margaret Jane might be a link to her sister too? I wish I could be certain.
Just to confuse the mix I found two baptisms in castledawson slightly later than Esther dob (haven’t found her baptism)
James Wright born 29/12/1844 father John Wright, mother Jane Morwood
Nancy Wright born 12/11/1842 father John Wright mother Jane Davis