How to convert a vector of integer arrays into a 2D array in C++?

So I have been looking at the following post for converting a vector into an array but this method does not seem to be converting for my use case.

How to convert vector to array

vector<int[256]> table; // is my table that I want to convert

// There is then code in the middle that will fill it

int** convert = &table[0][0] // is the first method that I attempted

convert = table.data(); // is the other method to convert that doesn't work

I belive my understanding of the back end of the data type is where my knowledge falls short. Any help on this would be appreciated