Parallel
1 Kings 6:8
Brenton's English Septuagint · Berean Standard Bible
And the porch of the under side [was] below the right wing of the house, and [there was] a winding ascent into the middle [chamber], and from the middle to the third story.
The entrance to the bottom (note: LXX and Targum; Hebrew middle) floor was on the south side of the temple. A stairway led up to the middle level, and from there to the third floor.