From the host to all the extensions, displays are connected by twisted-pair wires, no positive and negative poles. All the extensions of the system are all connected in parallel on the bus, which can be flexibly connected, but should minimize the distance from the host to the extensions.
All connection points require welding, and ensure that the welding is good, can not be disconnected. After the wiring is completed, use a multimeter resistance file to test the line, do not have to have a short circuit.