SeeMeCNC Rostock MAX v2 Assembly Manual page 146

Cut the connector off of the EZStruder stepper motor and strip 1/2" of insulation off each
stepper motor wire and each one of the 22ga wires that you routed up the Y tower.
Fig. 12-15:Wires ready for splicing.
If you've never spliced wire before, I'd recommend using a simple splice called a Western Union
Splice. You can see how it's done below in Ill. 12-2.
Below is an example of what the splice looks like.
Fig. 12-16:Splice example.
I would recommend that if you use this splice,
you solder the joint before covering it with Electrician's
tape.
Rostock MAX v2 Assembly Guide
Ill. 12-2:A Western Union Splice.
146