Wire to board connector structure is very simple: the electrodes (contact) placed in the housing (plastic shell). Contacts are of two types: stick or flake "plug" and "Jack". Completely into the socket and plug cover, complete "pair". (1) generally, socket connected to a wire and plug attached to the substrate, but this can be reversed according to usage. Connection of wires and contact usually use "pressure joint" skills, such as crimping terminals. Connection wires and contacts can also apply "pressure welded". Converge for low current welding skills in order briefly contact insulated wire connected to the approach, allow full convergence. This approach is convenient, but the durability and deterioration. Both skills can prevent overheating caused by soldering skills, maintain cohesion against harm. In addition, air-tight cohesion regions are not exposed to the air, can still link safe.