Good morning
If they were non-conformist they would have a registry office wedding as their places of worship were not licensed for weddings; even today if you are wed at a chapel you have to have the registrar present.
I see that you have chosen Pwllheli as a user name - I live in the next town along ! Do you live there ?
I note you say that the wife was a Scottish Baptist - my mother's maternal side were all scottish baptist from the Merioneth area I would be really interested to hear of your family line. There seems a strong dna link with many families who are descended from the Scottish Baptists in this area.
Nesta