Ensure that the drive gear inside the tower is still attached to the belt, and adjust as required.

Apply pressure on the pulley towards the end cap and secure the pulley to the endcap using the retaining screw.  Ensure that the screw is not making contact with the belt.

This is not required, but this step was completed for this project to maintain the aesthetics of the original machine.

If no issues are found, continue.  If issues with the movement are found, diagnose and correct the issues before proceeding.

Use 4x M3x8 screws.  The old carriage and hotend assembly can be seen on the left side of the image.

Add the hotend to the groove mount and clamp in place using the hotend clamp

Insert 2x M3x30 screws through the hotend clamp and secure the clamp and hotend to the hotend mount

Optional: Use the offset if the hotend mount or extruder contacts the tower before the X-axis endstop is triggered.  Adjust the thickness of the offset as necessary.  Secure to the carriage using the appropriate sized M3 screw (see components to determine the required length)