Some of the tracks on a double sided PCB connect from one side of the board to the other. Most of them connect via a component’s leg, but some don’t. These connections that don’t are called VIAs.

On commercially manufactured PCBs these VIAs are produced by a system called Plated-Thru-Hole.  This process electro-plates all the inside of the holes with copper.

However a simple technique is described below that doesn't require the EXPENSIVE plated-thru-hole technology.

A special Cut and Crop Tool  is used to produce a reliable connection through the VIA hole pads.

There are various names used for this tool:

• Cut and Clench
• Cut and Crimp

• Place the wire in the VIA hole. (Hole should be 0.7mm Diameter)

 
• Use the cut and crop tool to produce the result shown above

 
• Solder both sides of the wire link.