Slide the (05) Hot-end carriage over the end of the (18) X-axis
profile, ensuring the V-slot wheels go into the channel of the
aluminium extrusion, with two wheels being on top and the
single wheel at the bottom. The (05) Extruder carriage is
oriented with a majority of the assembly (fans, hot-end and
cover) on the front side of the (18) X-axis profile, opposite side
to that of the (06) XE stepper motor kit assembly already
attached (from step 5).