For your main extruder you can either use the tube that was previously installed in your machine and have a spare or replace it with your remaining PTFE tube.

You will route the tube the same way as previously through the wire loom to link the wires with the tube.

Install the tube just like the previous steps by inserting into the 2 into 1 adapter with locking clips and into the X Tower extruder with the locking clip.