I will work with the info from the electoral roll for now
I have a copy of the the actual marriage cert with no parent names maybe because they were married out in the country ?
No, country/regional/rural/ districts is not the reason.... , the reason there's no parents names recorded on the NSW BDM registration is two fold ....
a) the NSW legislation re civil registration and civl record keeping etc re marriages did not take effect until 1879 and even then NSW BDM did not enforce the requirement for the details re parents names etc, because of resistence from the various denominations,
b) the NSW BDM has not ever completed the reconcilation process the church records with their own civil registration records (some inner Sydney records are not yet reconciled.... funding issues existed even back in late 19th Century, and continue today, but I do wish they would get on with it though, as there are fewer and fewer people with the skills to read the late 19thC handwriting, as that style ceased being taught in NSW in the 1960s)
But regardless of where in NSW the 1865 marriage took place, the clergy interviewed the prospective couple, and obtained the names of their parents, etc made sure the two were eligible to marry (of age, or if minors, had consent, were not previously married, or could prove they were no longer married etc) ... That was a requirement of each denomination. So, from the mc transcript, you will find the name of the clergyman, and the place where he conducted the marriage ceremony. It is a matter of gaining access to the details he recorded....

Cheers, JM