Remove 1 inch of the outer jacket from the data cable with wire cutters or wire strippers, exposing the eight color-coded wires inside. Separate the wires and remove 3/8 inch of insulation from the end of each of these wires with a set of wire strippers.
Place the wires in the following order, from left to right: brown, brown/white, yellow, blue, blue/white, yellow/white, green, green/white.
Hold the wires between your thumb and fore finger and insert them carefully through the crimping ring on the back side of the wall plug connector, and insert the wires in the individual pin sockets on the back of the wall plug connector, pushing each wire into each pin in order.
Place your crimp tool on the crimping ring and close the jaws firmly on the crimp tool by squeezing the handles.