Park the SLT 1550 onto a flat surface. Activate the parking brake by pressing the parking-brake button, which is located under the steering wheel.
Measure the distance between the square holes on the bracket that holds the bumper in place; this bracket is used to connect the snow thrower. There are four holes on the sides of the bracket and five in the front.
Measure the brackets on the snow thrower to see if they match up. Many snow throwers have multiple bracket holes, so measure all of the different options. After you find the holes that match up, use these to connect the snow thrower to the SLT 1550.