How do I thread welding wire into the ArcReach Suitcase 12?

Lay the gun cable out straight and open the pressure assembly. Hold the wire tightly and cut off the end. Guide the wire between alignment pins, into drive roll grooves, and into the gun liner. Close the pressure assembly and tighten the pressure adjustment knob enough to feed wire, then press the jog switch until wire comes out of the gun. (Page 21)