Problems filling in petition:location of marriage

Hello, hope someone can help.
My ex and I are getting amicably divorced after 2+ of separation. We are not disagreeing over finances so have not appointed solicitors and were hoping things would be straightforward.

We married in Vegas and have a certified abstract of the marriage issued by Clerk County in Nevada. There are no details of where the marriage took place recorded on this certificate. The divorce petition asks for the location where the marriage was formed, "exactly as it appears on the certificate". I wasn''t sure whether to leave this blank, so decided to fill in the address where we married to be on the safe side. The petition has now been returned to me asking for a copy of a certificate with this address on, but I don''t have this - only the certified abstract of marriage.

Does anyone know if it would be OK to leave this section of the petition blank? Or should I put in the only relevant location on the certificate, I.e. "Clerk County, Nevada"?

Many thanks!

So, it turns out we did have a full marriage certificate, I''d just forgotten it existed because I''ve used the certified abstract as a supporting document for everything else that needed proof of marriage.
Lesson here: a certified abstract from Clerk County is not good enough for divorce!