slide into something
to slip or glide into something, as a car going into a ditch. It was raining hard, and car after car slid into the ditch at the sharp turn near Wagner Road. Mary's car slid right into the side of a bus.
slide something into something
and slide something into insert something into something effortlessly. Henry slid the end of the seat-belt buckle into its holder and started the car. slide in the buckle and make sure it's tight.