Pardon the delay in responding to you.
The documents to which you refer were perhaps historical in some fashion, but were not official statements of purpose. They represented the opinion of their authors only.
As stated, which is factual and with specificity, there were a total of 11 state legislatures or conventions, that published official secession documents around the beginning of the war.
If taken altogether, these 11 were ordinances officiating the secession act itself adopted by the 11 state conventions, legislatures, or popular referendum. .
With regard to the official documents of secession, none of the original 7 and eventual 11 ordinances mentioned slavery as a cause of their decision to leave the Union.
Continuing this line of conversation is merely going to frustrate you, because for about 150 years, historians have searched for some "official" cause of secession..........without success.
You might wish that, but it is not the case.
As an example, Texas held a state-wide referendum on their Declaration of Secession. It was an up or down vote; the votes came in overwhelmingly "up," and Texas seceded.
It was obviously far more than "the opinion of the authors."
With regard to the official documents of secession, none of the original 7 and eventual 11 ordinances mentioned slavery as a cause of their decision to leave the Union.
That's about as blatantly wrong as it is possible to be.
I'm not going to waste my time on you -- if you're going to dismiss what the states themselves said, you're beyond reason.