The cherubim spread their wings over the Ark, forming a canopy over the Ark and its carrying poles.
These poles were so long that their ends could be seen from the front entrance of the Temple's main room -- the Holy Place -- but not from outside it. They are still there to this day.
Nothing was in the Ark except the two stone tablets that Moses had placed there at Mount Sinai, where the LORD made a covenant with the people of Israel as they were leaving the land of Egypt.
References for 1 Kings 8:9
As the priests came out of the inner sanctuary, a cloud filled the Temple of the LORD.
The priests could not continue their work because the glorious presence of the LORD filled the Temple.
Then Solomon prayed, "O LORD, you have said that you would live in thick darkness.
But I have built a glorious Temple for you, where you can live forever!"
Then the king turned around to the entire community of Israel standing before him and gave this blessing:
"Blessed be the LORD, the God of Israel, who has kept the promise he made to my father, David.