And they laid the ark of the Lord upon the cart
Perhaps the same men that made the cart; however they were the Philistines, yet were not punished for touching it, as Uzzah was, though an Israelite, ( 2 Samuel 6:6 2 Samuel 6:7 )
and the coffer with the mice of gold, and the images of their emerods;
which coffer was placed in a purse or bag hung at the side of the ark, with the golden mice and emerods in it.