- [Instructor] In this video, you will learn how to retrofit the roll holder arms for the Scott Mod Slimroll Towel Dispenser. Open the front cover using the key or push button. Remove the used core. Grab the roll holder arm firmly and rock toward you using enough force to disengage the back corner. The new arms are installed by inserting the front corner first and then pushing the back corner until it clicks. You are now ready to load a new roll of Scott Towels.