1. Poor contact between terminal wires and terminals may be due to unreliable design, followed by errors in material selection, improper selection of molding processes, or poor quality of heat treatment, molds, and their assembly and fusion processes. Inadequate assembly can directly lead to poor fixation.

2. Poor fixation of terminal wires and terminals is due to poor positioning and locking fit size, poor consistency in processing quality, and large total separation force, which can lead to poor interchangeability.

3. If the terminal wire terminal is not fixed properly, it will largely cause instantaneous power outage, and in severe cases, it actually refers to product disassembly. If disassembled, it means that the terminal is in a plugged in state, and due to material, design, process, and other reasons, it can lead to unreliable structure, which can cause abnormal separation between the plug and socket, as well as between the pin and socket. In this case, it can cause serious consequences such as interruption of power transmission and signal control in the control system.