Removed the broken plastic parts on both sides and replaced them with the new metal parts.
The wheels on the new parts were too small for my side tracks. I had to remove the small wheels from the new parts and use my wheels from the old parts. I found out later that there are 2 different adjuster kit that have different size wheels for different models. Adjuster Kit W10712394 has the small wheels but Adjuster Kit W10712395 has the big wheels.