SeeMeCNC Rostock MAX v2 Assembly Manual page 89

The 18ga, four conductor cable is the first one we're going to use. When you're done stripping
it, you should have something like this:
Fig. 6-1: 18ga, four conductor hot end cabling.
Take one of the aluminum extrusions and thread this wire right through the small hole in the
center of the channel. Turning the wire counter-clockwise will help this process along.
When you're done, it should look like the image shown below.
Fig. 6-2: 18ga wires in the Z axis tower.
Rostock MAX v2 Assembly Guide
89