Slide one end of the 2GT drive belt into the right side of the x_carriage.

If you have trouble inserting the belt, it might be due to an extrusion multiplier issue (over-extrusion) or due to the use of a non-2GT belt (GT3 for example). Check the step 6 of Preflight check and disassembly chapter for more details.

Verify that the belt is fully inserted into the slot and that it extends into the enlarged center space.

Route the drive belt through the x_end_motor, around the drive pulley and back out through the x_end_motor.